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30026 vulnerabilities found for linux_kernel by linux
CVE-2026-64453 (GCVE-0-2026-64453)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
usb: misc: usbio: fix disconnect UAF in client teardown
Summary
In the Linux kernel, the following vulnerability has been resolved:
usb: misc: usbio: fix disconnect UAF in client teardown
usbio_disconnect() walks usbio->cli_list in reverse and uninitializes each
auxiliary device. auxiliary_device_uninit() drops the device reference, and
for an unbound child that can run usbio_auxdev_release() and free the
containing struct usbio_client.
list_for_each_entry_reverse() advances after the loop body by reading
client->link.prev. If the current client is freed by
auxiliary_device_uninit(), the iterator dereferences freed memory.
Use list_for_each_entry_safe_reverse() so the previous client is
cached before the body can drop the final reference. This preserves
reverse teardown order while keeping the next iterator cursor independent
of the current client's lifetime.
Validation reproduced this kernel report:
BUG: KASAN: slab-use-after-free in usbio_disconnect+0x12e/0x150
Call Trace:
<TASK>
dump_stack_lvl+0x66/0xa0
print_report+0xce/0x630
? usbio_disconnect+0x12e/0x150
? srso_alias_return_thunk+0x5/0xfbef5
? __virt_addr_valid+0x188/0x320
? usbio_disconnect+0x12e/0x150
kasan_report+0xe0/0x110
? usbio_disconnect+0x12e/0x150
usbio_disconnect+0x12e/0x150
usb_unbind_interface+0xf3/0x400
really_probe+0x316/0x660
__driver_probe_device+0x106/0x240
driver_probe_device+0x4a/0x110
__device_attach_driver+0xf1/0x1a0
? __pfx___device_attach_driver+0x10/0x10
bus_for_each_drv+0xf9/0x160
? __pfx_bus_for_each_drv+0x10/0x10
? srso_alias_return_thunk+0x5/0xfbef5
? trace_hardirqs_on+0x18/0x130
? srso_alias_return_thunk+0x5/0xfbef5
? _raw_spin_unlock_irqrestore+0x44/0x60
__device_attach+0x133/0x2a0
? __pfx___device_attach+0x10/0x10
? srso_alias_return_thunk+0x5/0xfbef5
? do_raw_spin_unlock+0x9a/0x100
? srso_alias_return_thunk+0x5/0xfbef5
device_initial_probe+0x55/0x70
bus_probe_device+0x4a/0xd0
device_add+0x9b9/0xc10
? __pfx_device_add+0x10/0x10
? _raw_spin_unlock_irqrestore+0x44/0x60
? srso_alias_return_thunk+0x5/0xfbef5
? lockdep_hardirqs_on_prepare+0xea/0x1a0
? srso_alias_return_thunk+0x5/0xfbef5
? usb_enable_lpm+0x3c/0x260
usb_set_configuration+0xb64/0xf20
usb_generic_driver_probe+0x5f/0x90
usb_probe_device+0x71/0x1b0
really_probe+0x46b/0x660
__driver_probe_device+0x106/0x240
driver_probe_device+0x4a/0x110
__device_attach_driver+0xf1/0x1a0
? __pfx___device_attach_driver+0x10/0x10
bus_for_each_drv+0xf9/0x160
? __pfx_bus_for_each_drv+0x10/0x10
? srso_alias_return_thunk+0x5/0xfbef5
? trace_hardirqs_on+0x18/0x130
? srso_alias_return_thunk+0x5/0xfbef5
? _raw_spin_unlock_irqrestore+0x44/0x60
__device_attach+0x133/0x2a0
? __pfx___device_attach+0x10/0x10
? srso_alias_return_thunk+0x5/0xfbef5
? do_raw_spin_unlock+0x9a/0x100
? srso_alias_return_thunk+0x5/0xfbef5
device_initial_probe+0x55/0x70
bus_probe_device+0x4a/0xd0
device_add+0x9b9/0xc10
? __pfx_device_add+0x10/0x10
? srso_alias_return_thunk+0x5/0xfbef5
? add_device_randomness+0xb7/0xf0
usb_new_device+0x492/0x870
hub_event+0x1b10/0x29c0
? __pfx_hub_event+0x10/0x10
? srso_alias_return_thunk+0x5/0xfbef5
? lock_acquire+0x187/0x300
? process_one_work+0x475/0xb90
? srso_alias_return_thunk+0x5/0xfbef5
? lock_release+0xc8/0x290
? srso_alias_return_thunk+0x5/0xfbef5
process_one_work+0x4d7/0xb90
? __pfx_process_one_work+0x10/0x10
? srso_alias_return_thunk+0x5/0xfbef5
? srso_alias_return_thunk+0x5/0xfbef5
? __list_add_valid_or_report+0x37/0xf0
? __pfx_hub_event+0x10/0x10
? srso_alias_return_thunk+0x5/0xfbef5
worker_thread+0x2d8/0x570
? __pfx_worker_thread+0x10/0x10
kthread+0x1ad/0x1f0
? __pfx_kthread+0x10/0x10
ret_from_fork+0x3c9/0x540
? __pfx_ret_from_fork+0x10/0x10
? srso_alias_return_thunk+0x5/0xfbef5
? __switch_to+0x2e9/0x730
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1a/0x30
</TASK>
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
121a0f839dbb397af5fabb701cea3e9983223e50 , < c40090f8d19b415e2925b22be964b5d1f695666f
(git)
Affected: 121a0f839dbb397af5fabb701cea3e9983223e50 , < 1947b6411460d68b54b13c536961933166937d05 (git) Affected: 121a0f839dbb397af5fabb701cea3e9983223e50 , < 0bfeec21984fedd32987f4e4c0cde34b445af404 (git) |
|
| Linux | Linux |
Affected:
6.18
Unaffected: 0 , < 6.18 (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/usb/misc/usbio.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "c40090f8d19b415e2925b22be964b5d1f695666f",
"status": "affected",
"version": "121a0f839dbb397af5fabb701cea3e9983223e50",
"versionType": "git"
},
{
"lessThan": "1947b6411460d68b54b13c536961933166937d05",
"status": "affected",
"version": "121a0f839dbb397af5fabb701cea3e9983223e50",
"versionType": "git"
},
{
"lessThan": "0bfeec21984fedd32987f4e4c0cde34b445af404",
"status": "affected",
"version": "121a0f839dbb397af5fabb701cea3e9983223e50",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/usb/misc/usbio.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.18"
},
{
"lessThan": "6.18",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.39",
"versionStartIncluding": "6.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "6.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "6.18",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: misc: usbio: fix disconnect UAF in client teardown\n\nusbio_disconnect() walks usbio-\u003ecli_list in reverse and uninitializes each\nauxiliary device. auxiliary_device_uninit() drops the device reference, and\nfor an unbound child that can run usbio_auxdev_release() and free the\ncontaining struct usbio_client.\n\nlist_for_each_entry_reverse() advances after the loop body by reading\nclient-\u003elink.prev. If the current client is freed by\nauxiliary_device_uninit(), the iterator dereferences freed memory.\n\nUse list_for_each_entry_safe_reverse() so the previous client is\ncached before the body can drop the final reference. This preserves\nreverse teardown order while keeping the next iterator cursor independent\nof the current client\u0027s lifetime.\n\nValidation reproduced this kernel report:\nBUG: KASAN: slab-use-after-free in usbio_disconnect+0x12e/0x150\n\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x66/0xa0\n print_report+0xce/0x630\n ? usbio_disconnect+0x12e/0x150\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? __virt_addr_valid+0x188/0x320\n ? usbio_disconnect+0x12e/0x150\n kasan_report+0xe0/0x110\n ? usbio_disconnect+0x12e/0x150\n usbio_disconnect+0x12e/0x150\n usb_unbind_interface+0xf3/0x400\n really_probe+0x316/0x660\n __driver_probe_device+0x106/0x240\n driver_probe_device+0x4a/0x110\n __device_attach_driver+0xf1/0x1a0\n ? __pfx___device_attach_driver+0x10/0x10\n bus_for_each_drv+0xf9/0x160\n ? __pfx_bus_for_each_drv+0x10/0x10\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? trace_hardirqs_on+0x18/0x130\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? _raw_spin_unlock_irqrestore+0x44/0x60\n __device_attach+0x133/0x2a0\n ? __pfx___device_attach+0x10/0x10\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? do_raw_spin_unlock+0x9a/0x100\n ? srso_alias_return_thunk+0x5/0xfbef5\n device_initial_probe+0x55/0x70\n bus_probe_device+0x4a/0xd0\n device_add+0x9b9/0xc10\n ? __pfx_device_add+0x10/0x10\n ? _raw_spin_unlock_irqrestore+0x44/0x60\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? lockdep_hardirqs_on_prepare+0xea/0x1a0\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? usb_enable_lpm+0x3c/0x260\n usb_set_configuration+0xb64/0xf20\n usb_generic_driver_probe+0x5f/0x90\n usb_probe_device+0x71/0x1b0\n really_probe+0x46b/0x660\n __driver_probe_device+0x106/0x240\n driver_probe_device+0x4a/0x110\n __device_attach_driver+0xf1/0x1a0\n ? __pfx___device_attach_driver+0x10/0x10\n bus_for_each_drv+0xf9/0x160\n ? __pfx_bus_for_each_drv+0x10/0x10\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? trace_hardirqs_on+0x18/0x130\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? _raw_spin_unlock_irqrestore+0x44/0x60\n __device_attach+0x133/0x2a0\n ? __pfx___device_attach+0x10/0x10\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? do_raw_spin_unlock+0x9a/0x100\n ? srso_alias_return_thunk+0x5/0xfbef5\n device_initial_probe+0x55/0x70\n bus_probe_device+0x4a/0xd0\n device_add+0x9b9/0xc10\n ? __pfx_device_add+0x10/0x10\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? add_device_randomness+0xb7/0xf0\n usb_new_device+0x492/0x870\n hub_event+0x1b10/0x29c0\n ? __pfx_hub_event+0x10/0x10\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? lock_acquire+0x187/0x300\n ? process_one_work+0x475/0xb90\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? lock_release+0xc8/0x290\n ? srso_alias_return_thunk+0x5/0xfbef5\n process_one_work+0x4d7/0xb90\n ? __pfx_process_one_work+0x10/0x10\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? __list_add_valid_or_report+0x37/0xf0\n ? __pfx_hub_event+0x10/0x10\n ? srso_alias_return_thunk+0x5/0xfbef5\n worker_thread+0x2d8/0x570\n ? __pfx_worker_thread+0x10/0x10\n kthread+0x1ad/0x1f0\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x3c9/0x540\n ? __pfx_ret_from_fork+0x10/0x10\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? __switch_to+0x2e9/0x730\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e"
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:55:57.317Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c40090f8d19b415e2925b22be964b5d1f695666f"
},
{
"url": "https://git.kernel.org/stable/c/1947b6411460d68b54b13c536961933166937d05"
},
{
"url": "https://git.kernel.org/stable/c/0bfeec21984fedd32987f4e4c0cde34b445af404"
}
],
"title": "usb: misc: usbio: fix disconnect UAF in client teardown",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64453",
"datePublished": "2026-07-25T08:51:22.478Z",
"dateReserved": "2026-07-19T15:36:31.789Z",
"dateUpdated": "2026-08-17T04:55:57.317Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-64452 (GCVE-0-2026-64452)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
6lowpan: fix NHC entry use-after-free on error path
Summary
In the Linux kernel, the following vulnerability has been resolved:
6lowpan: fix NHC entry use-after-free on error path
lowpan_nhc_do_uncompression() looks up an NHC descriptor while holding
lowpan_nhc_lock. If the descriptor has no uncompress callback, the error
path drops the lock before printing nhc->name.
lowpan_nhc_del() removes descriptors under the same lock and then relies
on synchronize_net() before the owning module can be unloaded. That only
waits for net RX RCU readers. lowpan_header_decompress() is also exported
and can be reached from callers that are not necessarily covered by the net
core RX critical section, for example the Bluetooth 6LoWPAN L2CAP receive
path.
This leaves a race where one task drops lowpan_nhc_lock in the error path,
another task unregisters and frees the matching descriptor after
synchronize_net() returns, and the first task then dereferences nhc->name
for the warning.
With the post-unlock window widened, KASAN reports:
BUG: KASAN: slab-use-after-free in lowpan_nhc_do_uncompression+0x1f4/0x220
Read of size 8
lowpan_nhc_do_uncompression
lowpan_header_decompress
Fix this by printing the warning before dropping lowpan_nhc_lock, so the
descriptor name is read while unregister is still excluded. The malformed
packet is still rejected with -ENOTSUPP.
Severity
7.1 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
92aa7c65d295f3cbb96904afe335f683e55584b8 , < 9c2f5c0829a8c8b904dae36be6d8056b719ac605
(git)
Affected: 92aa7c65d295f3cbb96904afe335f683e55584b8 , < 80b5c8779acee0550845394fb3e5176a398aa24c (git) Affected: 92aa7c65d295f3cbb96904afe335f683e55584b8 , < cc27aea4d454abfb385ee2c9499c78b96db9b728 (git) Affected: 92aa7c65d295f3cbb96904afe335f683e55584b8 , < a8e3a94711134e898c6021a6b77374efa91b3639 (git) Affected: 92aa7c65d295f3cbb96904afe335f683e55584b8 , < 593b78bb3c7ef0c6e9ae6fdf5afa80a5f7573168 (git) Affected: 92aa7c65d295f3cbb96904afe335f683e55584b8 , < 0beccbcf50de125be5520d0ffc59af4bb8655482 (git) Affected: 92aa7c65d295f3cbb96904afe335f683e55584b8 , < b713aa0cc344f10f7a9928a230b5f5e780d04078 (git) Affected: 92aa7c65d295f3cbb96904afe335f683e55584b8 , < 1720db928e5a58ca7d75ac1d514c3b73fd7061a7 (git) |
|
| Linux | Linux |
Affected:
4.1
Unaffected: 0 , < 4.1 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/6lowpan/nhc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "9c2f5c0829a8c8b904dae36be6d8056b719ac605",
"status": "affected",
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},
{
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},
{
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"versionType": "git"
},
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"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/6lowpan/nhc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.1"
},
{
"lessThan": "4.1",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\n6lowpan: fix NHC entry use-after-free on error path\n\nlowpan_nhc_do_uncompression() looks up an NHC descriptor while holding\nlowpan_nhc_lock. If the descriptor has no uncompress callback, the error\npath drops the lock before printing nhc-\u003ename.\n\nlowpan_nhc_del() removes descriptors under the same lock and then relies\non synchronize_net() before the owning module can be unloaded. That only\nwaits for net RX RCU readers. lowpan_header_decompress() is also exported\nand can be reached from callers that are not necessarily covered by the net\ncore RX critical section, for example the Bluetooth 6LoWPAN L2CAP receive\npath.\n\nThis leaves a race where one task drops lowpan_nhc_lock in the error path,\nanother task unregisters and frees the matching descriptor after\nsynchronize_net() returns, and the first task then dereferences nhc-\u003ename\nfor the warning.\n\nWith the post-unlock window widened, KASAN reports:\n\n BUG: KASAN: slab-use-after-free in lowpan_nhc_do_uncompression+0x1f4/0x220\n Read of size 8\n lowpan_nhc_do_uncompression\n lowpan_header_decompress\n\nFix this by printing the warning before dropping lowpan_nhc_lock, so the\ndescriptor name is read while unregister is still excluded. The malformed\npacket is still rejected with -ENOTSUPP."
}
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"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
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"value": "AV:A - An adjacent Bluetooth LE peer can deliver a crafted IPHC/NHC frame through the unauthenticated L2CAP IPSP receive path to the vulnerable decompressor.\nAC:H - Exploitation requires the matching loadable NHC descriptor to be unregistered and freed during the tiny post-unlock window, and the adjacent attacker cannot independently force that module-unload side of the race.\nPR:N - The Bluetooth packet-processing path requires no attacker privileges or authenticated pairing because the IPSP channel uses BT_SECURITY_LOW; CAP_SYS_MODULE belongs to the victim-side unload actor.\nUI:R - Successful triggering requires a victim administrator or module-management action to unload the matching NHC module while the malicious packet is being processed.\nS:U - The vulnerability compromises the affected host kernel without crossing a separate virtualization, IOMMU, or security-authority boundary.\nC:H - The freed descriptor\u0027s name pointer is dereferenced as a string, so reused contents can cause an unbounded kernel-memory read and disclosure through the kernel log.\nI:H - As a kernel-space use-after-free, freed-object replacement is conservatively treated as potentially enabling memory-corruption or control-flow compromise.\nA:H - Dereferencing an invalid freed descriptor or string pointer can produce a kernel oops or panic and render the system unavailable."
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CVE-2026-64451 (GCVE-0-2026-64451)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
tracing: Fix NULL pointer dereference in func_set_flag()
Summary
In the Linux kernel, the following vulnerability has been resolved:
tracing: Fix NULL pointer dereference in func_set_flag()
func_set_flag() dereferences tr->current_trace_flags before verifying
that the current tracer is actually the function tracer. When the active
tracer has been switched away from "function" (e.g., to "wakeup_rt"),
tr->current_trace_flags can be NULL, leading to a NULL pointer
dereference and kernel crash.
The call chain that triggers this is:
trace_options_write()
-> __set_tracer_option()
-> trace->set_flag() /* func_set_flag */
In func_set_flag(), the first operation is:
if (!!set == !!(tr->current_trace_flags->val & bit))
This dereferences tr->current_trace_flags unconditionally. The safety
check that guards against a non-function tracer:
if (tr->current_trace != &function_trace)
return 0;
is placed *after* the dereference, which is too late.
This was observed with the following crash dump:
BUG: unable to handle page fault at 0000000000000000
RIP: func_set_flag+0xd
Call Trace:
__set_tracer_option+0x27
trace_options_write+0x75
vfs_write+0x12a
ksys_write+0x66
do_syscall_64+0x5b
RIP: ffffffff914c973d RSP: ff67ec88b01dfdf0 RFLAGS: 00010202
RAX: 0000000000000000 RBX: ff3a826e80354580 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff93918080
The disassembly confirms the fault:
func_set_flag+0: mov 0x1f08(%rdi), %rax ; RAX = tr->current_trace_flags = NULL
func_set_flag+13: mov (%rax), %eax ; page fault: dereference NULL
At the time of the crash:
tr->current_trace_flags = 0x0 (NULL)
tr->current_trace = wakeup_rt_tracer (not function_trace)
The scenario is that a process opens a function tracer option file (such
as "func_stack_trace"), then the current tracer is switched to another
tracer (e.g., "wakeup_rt"), which sets current_trace_flags to NULL. When
the process subsequently writes to the option file, func_set_flag() is
invoked and crashes on the NULL dereference.
Fix this by moving the current_trace check before the
current_trace_flags dereference, so that func_set_flag() returns early
when the function tracer is not active.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
76680d0d2825900f23bf35290ab2b80bdf3a8e4a , < 69f17ac132a38974cf1defb480cef6b79d1ab768
(git)
Affected: 76680d0d2825900f23bf35290ab2b80bdf3a8e4a , < c3e94604675e3db186111b8942650d86577df9b0 (git) |
|
| Linux | Linux |
Affected:
6.19
Unaffected: 0 , < 6.19 (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix NULL pointer dereference in func_set_flag()\n\nfunc_set_flag() dereferences tr-\u003ecurrent_trace_flags before verifying\nthat the current tracer is actually the function tracer. When the active\ntracer has been switched away from \"function\" (e.g., to \"wakeup_rt\"),\ntr-\u003ecurrent_trace_flags can be NULL, leading to a NULL pointer\ndereference and kernel crash.\n\nThe call chain that triggers this is:\n\n trace_options_write()\n -\u003e __set_tracer_option()\n -\u003e trace-\u003eset_flag() /* func_set_flag */\n\nIn func_set_flag(), the first operation is:\n\n if (!!set == !!(tr-\u003ecurrent_trace_flags-\u003eval \u0026 bit))\n\nThis dereferences tr-\u003ecurrent_trace_flags unconditionally. The safety\ncheck that guards against a non-function tracer:\n\n if (tr-\u003ecurrent_trace != \u0026function_trace)\n return 0;\n\nis placed *after* the dereference, which is too late.\n\nThis was observed with the following crash dump:\n\n BUG: unable to handle page fault at 0000000000000000\n RIP: func_set_flag+0xd\n\n Call Trace:\n __set_tracer_option+0x27\n trace_options_write+0x75\n vfs_write+0x12a\n ksys_write+0x66\n do_syscall_64+0x5b\n\n RIP: ffffffff914c973d RSP: ff67ec88b01dfdf0 RFLAGS: 00010202\n RAX: 0000000000000000 RBX: ff3a826e80354580 RCX: 0000000000000001\n RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff93918080\n\nThe disassembly confirms the fault:\n\n func_set_flag+0: mov 0x1f08(%rdi), %rax ; RAX = tr-\u003ecurrent_trace_flags = NULL\n func_set_flag+13: mov (%rax), %eax ; page fault: dereference NULL\n\nAt the time of the crash:\n tr-\u003ecurrent_trace_flags = 0x0 (NULL)\n tr-\u003ecurrent_trace = wakeup_rt_tracer (not function_trace)\n\nThe scenario is that a process opens a function tracer option file (such\nas \"func_stack_trace\"), then the current tracer is switched to another\ntracer (e.g., \"wakeup_rt\"), which sets current_trace_flags to NULL. When\nthe process subsequently writes to the option file, func_set_flag() is\ninvoked and crashes on the NULL dereference.\n\nFix this by moving the current_trace check before the\ncurrent_trace_flags dereference, so that func_set_flag() returns early\nwhen the function tracer is not active."
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CVE-2026-64450 (GCVE-0-2026-64450)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
tipc: fix out-of-bounds read in broadcast Gap ACK blocks
Summary
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix out-of-bounds read in broadcast Gap ACK blocks
A broadcast PROTOCOL/STATE_MSG can carry a Gap ACK blocks record in its
data area. tipc_get_gap_ack_blks() only verifies that the record's len
field is self-consistent with its ugack_cnt/bgack_cnt counts
(sz == struct_size(p, gacks, ugack_cnt + bgack_cnt)); it does not check
that the record actually fits in the message data area, msg_data_sz().
The unicast caller tipc_link_proto_rcv() bounds it ("if (glen > dlen)
break;"), but the broadcast caller tipc_bcast_sync_rcv() discards the
returned size, so tipc_link_advance_transmq() copies the record off the
receive skb with an attacker-controlled count:
this_ga = kmemdup(ga, struct_size(ga, gacks, ga->bgack_cnt),
GFP_ATOMIC);
A TIPC neighbour that negotiated TIPC_GAP_ACK_BLOCK triggers it with one
ordinary broadcast STATE_MSG (msg_bc_ack_invalid() clear), sized so its
data area is short, carrying a Gap ACK record with len = 0x400,
bgack_cnt = 0xff and ugack_cnt = 0. len then equals
struct_size(p, gacks, 255), so the consistency check passes and ga is
non-NULL; kmemdup() reads struct_size(ga, gacks, 255) = 1024 bytes out
of the much smaller skb:
BUG: KASAN: slab-out-of-bounds in kmemdup_noprof+0x48/0x60
Read of size 1024 at addr ffff0000c7030d38 by task poc864/69
Call trace:
kmemdup_noprof+0x48/0x60
tipc_link_advance_transmq+0x86c/0xb80
tipc_link_bc_ack_rcv+0x19c/0x1e0
tipc_bcast_sync_rcv+0x1c4/0x2c4
tipc_rcv+0x85c/0x1340
tipc_l2_rcv_msg+0xac/0x104
The buggy address belongs to the object at ffff0000c7030d00
which belongs to the cache skbuff_small_head of size 704
The buggy address is located 56 bytes inside of
allocated 704-byte region [ffff0000c7030d00, ffff0000c7030fc0)
The copied-out bytes are subsequently consumed as gap/ack values, but
the read is already out of bounds at the kmemdup() regardless of how
they are used.
The unicast STATE path drops such a message: "if (glen > dlen) break;"
skips the rest of STATE_MSG handling and the skb is freed. Make the
broadcast path drop it too. tipc_bcast_sync_rcv() now bounds the record
against msg_data_sz() and, when it does not fit, reports it back through
tipc_node_bc_sync_rcv() to tipc_rcv() so the skb is discarded rather than
processed. ga is not cleared on this path: ga == NULL already means
"legacy peer without Selective ACK", a distinct legitimate state.
Severity
9.1 (Critical)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
d7626b5acff9227e2a65da636a53e09bdafdc0aa , < 055663d21dc4336f67933ab26bef3c5934be6324
(git)
Affected: d7626b5acff9227e2a65da636a53e09bdafdc0aa , < 016f5995c37a5a2c45198308f830f244517d70b7 (git) Affected: d7626b5acff9227e2a65da636a53e09bdafdc0aa , < 74b45af86a767594ba52330cd440ea84e24d700d (git) Affected: d7626b5acff9227e2a65da636a53e09bdafdc0aa , < 9a51115fcdc78687c8852bf93a1db3951dbb223b (git) Affected: d7626b5acff9227e2a65da636a53e09bdafdc0aa , < a21ed5064217cc33726da6c7ef1a520eba43aea1 (git) Affected: d7626b5acff9227e2a65da636a53e09bdafdc0aa , < 2de42e268174766cb2e2b90721afdfdff70e0d8d (git) Affected: d7626b5acff9227e2a65da636a53e09bdafdc0aa , < f333b6851bdf326fd2134133272dbbed0c94d921 (git) Affected: d7626b5acff9227e2a65da636a53e09bdafdc0aa , < 2b66974a1b6134a4bbc3bfed181f7418f688eb54 (git) |
|
| Linux | Linux |
Affected:
5.8
Unaffected: 0 , < 5.8 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64449 (GCVE-0-2026-64449)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
staging: vme_user: bound slave read/write to the kern_buf size
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: vme_user: bound slave read/write to the kern_buf size
The SLAVE-path helpers buffer_to_user() and buffer_from_user() copy
'count' bytes into/out of the fixed-size kern_buf (size_buf ==
PCI_BUF_SIZE == 0x20000, 128 KiB) using *ppos as the offset, without
bounding *ppos + count against size_buf.
vme_user_write()/vme_user_read() only clamp count to the VME window size
(image_size = vme_get_size(resource)), which VME_SET_SLAVE sets from the
user-supplied slave.size -- validated against the VME address space (up
to VME_A32_MAX = 4 GiB), not against PCI_BUF_SIZE. When the window
exceeds 128 KiB, a write()/read() copies past the kern_buf allocation.
Clamp count against size_buf in both helpers, with an early return when
*ppos is already at/after the buffer end. *ppos is >= 0 here (the caller
rejects negative offsets), so size_buf - *ppos cannot wrap. This mirrors
the existing clamp in the MASTER-path helpers resource_to_user() /
resource_from_user(), and matches the read()/write() convention of a
short transfer at end-of-buffer.
Found by static analysis (CodeQL taint tracking + CBMC bounded model
checking) and confirmed dynamically under KASAN with the vme_fake bridge:
BUG: KASAN: slab-out-of-bounds in _copy_from_user+0x2d/0x80
Write of size 262144 at addr ffff888004100000 by task trigger/68
_copy_from_user+0x2d/0x80
vme_user_write+0x13e/0x240 [vme_user]
vfs_write+0x1b8/0x7a0
ksys_write+0xb8/0x150
Severity
7.8 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
f00a86d98a1ec3e99d352cda926fab767ba43b1f , < 65358d89dc9f1c25d9364b2b3ef0f3b47717f9ed
(git)
Affected: f00a86d98a1ec3e99d352cda926fab767ba43b1f , < adc8b9c30d716c362646edb45662aa1c641a154a (git) Affected: f00a86d98a1ec3e99d352cda926fab767ba43b1f , < 8eff7cd4817e14dbe3b9952cce55ef52d1d38940 (git) Affected: f00a86d98a1ec3e99d352cda926fab767ba43b1f , < e99f2df433c63c86c93de1e5f08f16e404388756 (git) Affected: f00a86d98a1ec3e99d352cda926fab767ba43b1f , < 1b495fa0d4927c88d88bf346bf311f2e26e860ed (git) Affected: f00a86d98a1ec3e99d352cda926fab767ba43b1f , < 9f32f38265014fac7f5dc9490fb01a638ce6e121 (git) |
|
| Linux | Linux |
Affected:
2.6.32
Unaffected: 0 , < 2.6.32 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64448 (GCVE-0-2026-64448)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
smb: client: restrict implied bcc[0] exemption to responses without data area
Summary
In the Linux kernel, the following vulnerability has been resolved:
smb: client: restrict implied bcc[0] exemption to responses without data area
smb2_check_message() has a long-standing quirk that accepts a response
whose calculated length is one byte larger than the bytes actually
received ("server can return one byte more due to implied bcc[0]").
This was introduced to accommodate servers that omit the trailing bcc[0]
overlap byte when no data area is present.
However, the exemption is applied unconditionally, regardless of whether
the command actually carries a data area (has_smb2_data_area[]). When a
response with a data area is subject to the +1 exemption, the reported
data can extend one byte beyond the bytes actually received, yet
smb2_check_message() still accepts it. The subsequent decoder then reads
past the end of the receive buffer. This is reachable during NEGOTIATE
and SESSION_SETUP, before the session is established.
The resulting out-of-bounds reads are visible under KASAN when mounting
against a non-conforming server; both the SPNEGO/negTokenInit and the
NTLMSSP challenge decoders are affected:
BUG: KASAN: slab-out-of-bounds in asn1_ber_decoder+0x16a7/0x1b00
Read of size 1 at addr ffff8880084d67c0 by task mount.cifs/81
CPU: 1 UID: 0 PID: 81 Comm: mount.cifs Not tainted 7.1.0-rc6 #1
Call Trace:
<TASK>
dump_stack_lvl+0x4e/0x70
print_report+0x157/0x4c9
kasan_report+0xce/0x100
asn1_ber_decoder+0x16a7/0x1b00
decode_negTokenInit+0x19/0x30
SMB2_negotiate+0x31d9/0x4c90
cifs_negotiate_protocol+0x1f2/0x3f0
cifs_get_smb_ses+0x93f/0x17e0
cifs_mount_get_session+0x7f/0x3a0
cifs_mount+0xb4/0xcf0
cifs_smb3_do_mount+0x23a/0x1500
smb3_get_tree+0x3b0/0x630
vfs_get_tree+0x82/0x2d0
fc_mount+0x10/0x1b0
path_mount+0x50d/0x1de0
__x64_sys_mount+0x20b/0x270
do_syscall_64+0xee/0x590
entry_SYSCALL_64_after_hwframe+0x77/0x7f
</TASK>
Allocated by task 85:
kmem_cache_alloc_noprof+0x106/0x380
mempool_alloc_noprof+0x116/0x1e0
cifs_small_buf_get+0x31/0x80
allocate_buffers+0x10d/0x2b0
cifs_demultiplex_thread+0x1d5/0x1d50
kthread+0x2c6/0x390
ret_from_fork+0x36e/0x5a0
ret_from_fork_asm+0x1a/0x30
The buggy address is located 0 bytes to the right of
allocated 448-byte region [ffff8880084d6600, ffff8880084d67c0)
which belongs to the cache cifs_small_rq of size 448
BUG: KASAN: slab-out-of-bounds in kmemdup_noprof+0x36/0x50
Read of size 329 at addr ffff88800726c678 by task mount.cifs/89
CPU: 0 UID: 0 PID: 89 Comm: mount.cifs Tainted: G B 7.1.0-rc6 #1
Call Trace:
<TASK>
dump_stack_lvl+0x4e/0x70
print_report+0x157/0x4c9
kasan_report+0xce/0x100
kasan_check_range+0x10f/0x1e0
__asan_memcpy+0x23/0x60
kmemdup_noprof+0x36/0x50
decode_ntlmssp_challenge+0x457/0x680
SMB2_sess_auth_rawntlmssp_negotiate+0x6f0/0xcb0
SMB2_sess_setup+0x219/0x4f0
cifs_setup_session+0x248/0xaf0
cifs_get_smb_ses+0xf79/0x17e0
cifs_mount_get_session+0x7f/0x3a0
cifs_mount+0xb4/0xcf0
cifs_smb3_do_mount+0x23a/0x1500
smb3_get_tree+0x3b0/0x630
vfs_get_tree+0x82/0x2d0
fc_mount+0x10/0x1b0
path_mount+0x50d/0x1de0
__x64_sys_mount+0x20b/0x270
do_syscall_64+0xee/0x590
entry_SYSCALL_64_after_hwframe+0x77/0x7f
</TASK>
Allocated by task 93:
kmem_cache_alloc_noprof+0x106/0x380
mempool_alloc_noprof+0x116/0x1e0
cifs_small_buf_get+0x31/0x80
allocate_buffers+0x10d/0x2b0
cifs_demultiplex_thread+0x1d5/0x1d50
kthread+0x2c6/0x390
ret_from_fork+0x36e/0x5a0
ret_from_fork_asm+0x1a/0x30
The buggy address is located 120 bytes inside of
allocated 448-byte region [ffff88800726c600, ffff88800726c7c0)
which belongs to the cache cifs_small_rq of size 448
Restrict the +1 exemption to responses that have no data area, so that
it still covers the bcc[0] omission it was meant for. When a data area
is present, the +1 discrepancy instead means the reported data length
overruns the
---truncated---
Severity
8.2 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
093b2bdad3221e3fae3c26d89387e7297a157664 , < 8d0bbc78046d264bbf6a574ea6f9072258a43e35
(git)
Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < b6a381c01e2ac98a48e32ac0f2a45bbadd9e26b0 (git) Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 31c6312608c60b72a1feb99a5afb680645a3e8a3 (git) Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 573e502d14714d2947e22e7eff40ec20a6a44a42 (git) Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 419ec1b604d7fb60c10aec2dc062371f9fcd4940 (git) Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < ceb875a375dedbf51c9425c1d13a2d7a8435c08c (git) Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 6e9d10f62773b99bd927940fd9cbdfe7207e23ff (git) Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 53b7c271f06be4dd5cfc8c6ef552a8355c891a7f (git) |
|
| Linux | Linux |
Affected:
3.6
Unaffected: 0 , < 3.6 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/smb/client/smb2misc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "8d0bbc78046d264bbf6a574ea6f9072258a43e35",
"status": "affected",
"version": "093b2bdad3221e3fae3c26d89387e7297a157664",
"versionType": "git"
},
{
"lessThan": "b6a381c01e2ac98a48e32ac0f2a45bbadd9e26b0",
"status": "affected",
"version": "093b2bdad3221e3fae3c26d89387e7297a157664",
"versionType": "git"
},
{
"lessThan": "31c6312608c60b72a1feb99a5afb680645a3e8a3",
"status": "affected",
"version": "093b2bdad3221e3fae3c26d89387e7297a157664",
"versionType": "git"
},
{
"lessThan": "573e502d14714d2947e22e7eff40ec20a6a44a42",
"status": "affected",
"version": "093b2bdad3221e3fae3c26d89387e7297a157664",
"versionType": "git"
},
{
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"status": "affected",
"version": "093b2bdad3221e3fae3c26d89387e7297a157664",
"versionType": "git"
},
{
"lessThan": "ceb875a375dedbf51c9425c1d13a2d7a8435c08c",
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"version": "093b2bdad3221e3fae3c26d89387e7297a157664",
"versionType": "git"
},
{
"lessThan": "6e9d10f62773b99bd927940fd9cbdfe7207e23ff",
"status": "affected",
"version": "093b2bdad3221e3fae3c26d89387e7297a157664",
"versionType": "git"
},
{
"lessThan": "53b7c271f06be4dd5cfc8c6ef552a8355c891a7f",
"status": "affected",
"version": "093b2bdad3221e3fae3c26d89387e7297a157664",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/smb/client/smb2misc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.6"
},
{
"lessThan": "3.6",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.261",
"versionStartIncluding": "3.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "3.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.178",
"versionStartIncluding": "3.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "3.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.96",
"versionStartIncluding": "3.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.39",
"versionStartIncluding": "3.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "3.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "3.6",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: restrict implied bcc[0] exemption to responses without data area\n\nsmb2_check_message() has a long-standing quirk that accepts a response\nwhose calculated length is one byte larger than the bytes actually\nreceived (\"server can return one byte more due to implied bcc[0]\").\nThis was introduced to accommodate servers that omit the trailing bcc[0]\noverlap byte when no data area is present.\n\nHowever, the exemption is applied unconditionally, regardless of whether\nthe command actually carries a data area (has_smb2_data_area[]). When a\nresponse with a data area is subject to the +1 exemption, the reported\ndata can extend one byte beyond the bytes actually received, yet\nsmb2_check_message() still accepts it. The subsequent decoder then reads\npast the end of the receive buffer. This is reachable during NEGOTIATE\nand SESSION_SETUP, before the session is established.\n\nThe resulting out-of-bounds reads are visible under KASAN when mounting\nagainst a non-conforming server; both the SPNEGO/negTokenInit and the\nNTLMSSP challenge decoders are affected:\n\n BUG: KASAN: slab-out-of-bounds in asn1_ber_decoder+0x16a7/0x1b00\n Read of size 1 at addr ffff8880084d67c0 by task mount.cifs/81\n CPU: 1 UID: 0 PID: 81 Comm: mount.cifs Not tainted 7.1.0-rc6 #1\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x4e/0x70\n print_report+0x157/0x4c9\n kasan_report+0xce/0x100\n asn1_ber_decoder+0x16a7/0x1b00\n decode_negTokenInit+0x19/0x30\n SMB2_negotiate+0x31d9/0x4c90\n cifs_negotiate_protocol+0x1f2/0x3f0\n cifs_get_smb_ses+0x93f/0x17e0\n cifs_mount_get_session+0x7f/0x3a0\n cifs_mount+0xb4/0xcf0\n cifs_smb3_do_mount+0x23a/0x1500\n smb3_get_tree+0x3b0/0x630\n vfs_get_tree+0x82/0x2d0\n fc_mount+0x10/0x1b0\n path_mount+0x50d/0x1de0\n __x64_sys_mount+0x20b/0x270\n do_syscall_64+0xee/0x590\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n \u003c/TASK\u003e\n Allocated by task 85:\n kmem_cache_alloc_noprof+0x106/0x380\n mempool_alloc_noprof+0x116/0x1e0\n cifs_small_buf_get+0x31/0x80\n allocate_buffers+0x10d/0x2b0\n cifs_demultiplex_thread+0x1d5/0x1d50\n kthread+0x2c6/0x390\n ret_from_fork+0x36e/0x5a0\n ret_from_fork_asm+0x1a/0x30\n The buggy address is located 0 bytes to the right of\n allocated 448-byte region [ffff8880084d6600, ffff8880084d67c0)\n which belongs to the cache cifs_small_rq of size 448\n\n BUG: KASAN: slab-out-of-bounds in kmemdup_noprof+0x36/0x50\n Read of size 329 at addr ffff88800726c678 by task mount.cifs/89\n CPU: 0 UID: 0 PID: 89 Comm: mount.cifs Tainted: G B 7.1.0-rc6 #1\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x4e/0x70\n print_report+0x157/0x4c9\n kasan_report+0xce/0x100\n kasan_check_range+0x10f/0x1e0\n __asan_memcpy+0x23/0x60\n kmemdup_noprof+0x36/0x50\n decode_ntlmssp_challenge+0x457/0x680\n SMB2_sess_auth_rawntlmssp_negotiate+0x6f0/0xcb0\n SMB2_sess_setup+0x219/0x4f0\n cifs_setup_session+0x248/0xaf0\n cifs_get_smb_ses+0xf79/0x17e0\n cifs_mount_get_session+0x7f/0x3a0\n cifs_mount+0xb4/0xcf0\n cifs_smb3_do_mount+0x23a/0x1500\n smb3_get_tree+0x3b0/0x630\n vfs_get_tree+0x82/0x2d0\n fc_mount+0x10/0x1b0\n path_mount+0x50d/0x1de0\n __x64_sys_mount+0x20b/0x270\n do_syscall_64+0xee/0x590\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n \u003c/TASK\u003e\n Allocated by task 93:\n kmem_cache_alloc_noprof+0x106/0x380\n mempool_alloc_noprof+0x116/0x1e0\n cifs_small_buf_get+0x31/0x80\n allocate_buffers+0x10d/0x2b0\n cifs_demultiplex_thread+0x1d5/0x1d50\n kthread+0x2c6/0x390\n ret_from_fork+0x36e/0x5a0\n ret_from_fork_asm+0x1a/0x30\n The buggy address is located 120 bytes inside of\n allocated 448-byte region [ffff88800726c600, ffff88800726c7c0)\n which belongs to the cache cifs_small_rq of size 448\n\nRestrict the +1 exemption to responses that have no data area, so that\nit still covers the bcc[0] omission it was meant for. When a data area\nis present, the +1 discrepancy instead means the reported data length\noverruns the\n---truncated---"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.2,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - A malicious or compromised SMB server can trigger the flaw through crafted TCP responses, typically over port 445.\nAC:L - The server directly controls the frame length, data offset, and declared data length, so no race or condition outside the attacker\u0027s control is required.\nPR:N - NEGOTIATE and SESSION_SETUP responses are processed before authentication and signature verification, requiring no attacker credentials or local capabilities.\nUI:N - An existing persistent SMB mount automatically renegotiates after a server-induced reconnect, allowing exploitation without contemporaneous user action.\nS:U - The vulnerable SMB decoder and resulting kernel impact remain within the host kernel\u0027s security authority.\nC:L - The discrepancy permits exactly one byte beyond the received data to be read; the NTLM path can preserve and reflect that byte in subsequent authentication data, but the disclosure is strictly bounded.\nI:N - The flaw performs an out-of-bounds read and copies data into valid allocations; it provides no out-of-bounds write or other demonstrated memory-modification primitive.\nA:H - The demonstrated slab out-of-bounds access raises a KASAN BUG and can panic hardened kernels, and a malicious peer can retrigger it during negotiation or reconnection."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:55:51.813Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/8d0bbc78046d264bbf6a574ea6f9072258a43e35"
},
{
"url": "https://git.kernel.org/stable/c/b6a381c01e2ac98a48e32ac0f2a45bbadd9e26b0"
},
{
"url": "https://git.kernel.org/stable/c/31c6312608c60b72a1feb99a5afb680645a3e8a3"
},
{
"url": "https://git.kernel.org/stable/c/573e502d14714d2947e22e7eff40ec20a6a44a42"
},
{
"url": "https://git.kernel.org/stable/c/419ec1b604d7fb60c10aec2dc062371f9fcd4940"
},
{
"url": "https://git.kernel.org/stable/c/ceb875a375dedbf51c9425c1d13a2d7a8435c08c"
},
{
"url": "https://git.kernel.org/stable/c/6e9d10f62773b99bd927940fd9cbdfe7207e23ff"
},
{
"url": "https://git.kernel.org/stable/c/53b7c271f06be4dd5cfc8c6ef552a8355c891a7f"
}
],
"title": "smb: client: restrict implied bcc[0] exemption to responses without data area",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64448",
"datePublished": "2026-07-25T08:51:18.796Z",
"dateReserved": "2026-07-19T15:36:31.788Z",
"dateUpdated": "2026-08-17T04:55:51.813Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-64447 (GCVE-0-2026-64447)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
staging: media: ipu7: fix double-free and use-after-free in error paths
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: media: ipu7: fix double-free and use-after-free in error paths
In both ipu7_isys_init() and ipu7_psys_init(), pdata is allocated and
then passed to ipu7_bus_initialize_device(), which stores it in
adev->pdata. The ipu7_bus_release() function frees adev->pdata when the
device's reference count drops to zero.
Two error paths incorrectly call kfree(pdata) after the device teardown
has already freed it:
1. When ipu7_mmu_init() fails: put_device() is called, which drops the
reference count to zero and triggers ipu7_bus_release() ->
kfree(pdata). The subsequent kfree(pdata) is a double-free.
2. When ipu7_bus_add_device() fails: it calls auxiliary_device_uninit()
internally, which calls put_device() -> ipu7_bus_release() ->
kfree(pdata). The subsequent kfree(pdata) is again a double-free.
Note that the kfree(pdata) when ipu7_bus_initialize_device() itself
fails is correct, because in that case auxiliary_device_init() failed
and the release function was never set up, so pdata must be freed
manually.
Additionally, the error code was not saved before calling put_device(),
causing ERR_CAST() to dereference the already-freed adev pointer when
constructing the return value. Fix this by saving the error from
dev_err_probe() before put_device() and returning ERR_PTR() instead.
Remove the redundant kfree(pdata) calls and fix the use-after-free in
the return values of the two affected error paths.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
b7fe4c0019b12d60ece3e99eeb0ccfd5a1d103e5 , < b5ddc7257bee71f5b8cf9083e2b0ac0427e9fbb3
(git)
Affected: b7fe4c0019b12d60ece3e99eeb0ccfd5a1d103e5 , < 837c1f9655421055f751ed34745e820a54a27642 (git) Affected: b7fe4c0019b12d60ece3e99eeb0ccfd5a1d103e5 , < d3a9a8cf2d7fd61a2f63df61f6cbc0a9bb007cc0 (git) |
|
| Linux | Linux |
Affected:
6.17
Unaffected: 0 , < 6.17 (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/staging/media/ipu7/ipu7.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b5ddc7257bee71f5b8cf9083e2b0ac0427e9fbb3",
"status": "affected",
"version": "b7fe4c0019b12d60ece3e99eeb0ccfd5a1d103e5",
"versionType": "git"
},
{
"lessThan": "837c1f9655421055f751ed34745e820a54a27642",
"status": "affected",
"version": "b7fe4c0019b12d60ece3e99eeb0ccfd5a1d103e5",
"versionType": "git"
},
{
"lessThan": "d3a9a8cf2d7fd61a2f63df61f6cbc0a9bb007cc0",
"status": "affected",
"version": "b7fe4c0019b12d60ece3e99eeb0ccfd5a1d103e5",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/staging/media/ipu7/ipu7.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.17"
},
{
"lessThan": "6.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
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CVE-2026-64446 (GCVE-0-2026-64446)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()
supplicant_ie is a 256-byte array in struct security_priv. The WPA and
WPA2 IE copy paths use:
memcpy(padapter->securitypriv.supplicant_ie, &pwpa[0], wpa_ielen + 2);
where wpa_ielen is the raw IE length field (u8, 0-255). When a local user
supplies a connect request via nl80211 with a crafted WPA IE of length 255,
wpa_ielen + 2 equals 257, overflowing the 256-byte buffer by one byte into
the adjacent last_mic_err_time field.
rtw_parse_wpa_ie() does not prevent this: its length consistency check
compares *(wpa_ie+1) against (u8)(wpa_ie_len-2), which is (u8)(255) == 255
when wpa_ie_len = 257, so the check passes silently.
Add explicit bounds checks for both the WPA and WPA2 paths before the
memcpy, rejecting any IE whose total size (wpa_ielen + 2) exceeds the
supplicant_ie buffer.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
554c0a3abf216c991c5ebddcdb2c08689ecd290b , < a94a643a80a84ceb8139061c3d6bf988d75e45a5
(git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 2131621986c62c86109ce4d84cf73a73757eb8a6 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6f20d7b0ee47c470734a69379b0fc6647c519603 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 5d7812360abf3143afcbf5efe4ef242448fa1f28 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 46f66c16a95191d9aca07a72ae6b1252a244e26c (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < b9c4bf133c3c47e23baf4f5403b98a953bf58606 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 138cd190efd56ab36c9fdd8fef8749d06937f24b (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 5a752a616e756844388a1a45404db9fc29fec655 (git) |
|
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64445 (GCVE-0-2026-64445)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()
OnAuth() has two bugs in the shared-key authentication path.
When the Privacy bit is set, rtw_wep_decrypt() is called without
verifying that the frame is long enough to contain a valid WEP IV and
ICV. Inside rtw_wep_decrypt(), length is computed as:
length = len - WLAN_HDR_A3_LEN - iv_len
and then passed as (length - 4) to crc32_le(). If len is less than
WLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative
and, after the implicit cast to size_t, causes crc32_le() to read far
beyond the frame buffer. Add a minimum length check before accessing
the IV field and calling the decryption path.
When processing a seq=3 response, rtw_get_ie() stores the Challenge
Text IE length in ie_len, but the subsequent memcmp() always reads 128
bytes regardless of ie_len. IEEE 802.11 mandates a challenge text of
exactly 128 bytes; reject any IE whose length field differs, matching
the check already applied to OnAuthClient().
Severity
8.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 665e1ecb68b4e8419604e70a33f02d1c8b0222c6
(git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < c9000c93078e5c0a5a651b077c0ec92a4bc7d580 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 1f6c9d255bdda41216b6e34c96aa2b1abee0bb84 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 3e44a7665f3abd320a80d9c64ee4a93317041b8b (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 64ec4192d9c10e96922245d4a6747304cc76b19d (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < d90b9f39f375c9826ef145605dfe97765d0ecb91 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < a1fc19d61f661d47204f095b593de507884849f7 (git) |
|
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64444 (GCVE-0-2026-64444)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
staging: rtl8723bs: fix OOB read in OnAssocRsp() IE loop
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix OOB read in OnAssocRsp() IE loop
The IE parsing loop in OnAssocRsp() advances by (pIE->length + 2) each
iteration but only guards on i < pkt_len. When a malicious AP sends an
AssocResponse whose last IE has only one byte remaining in the frame
(the element_id byte lands at pkt_len-1), the loop reads pIE->length
from pframe[pkt_len], which is one byte past the allocated receive buffer.
Additionally, even when the header bytes are in bounds, pIE->length
itself can extend the data window beyond pkt_len, silently passing a
truncated IE to the handler functions.
Add two guards at the top of the loop body:
1. Break if fewer than sizeof(*pIE) bytes remain (can't read header).
2. Break if the IE's declared data extends past pkt_len.
Severity
8.1 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 889ca6000ac7fa73457b041848fcb08e0d51b809
(git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 1a52a05471494546f955a58e8c170c0c796c52d5 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 0406d746574e875d8778552eb674fcfbf5330bfb (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 0970dd47726a57e52013594e9fbf667586eb3673 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 04f612dc03427e0b1ac80a2611b5ac0ba93ac446 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 7e7741c8315e4160aead00a60cdd6f81ab880717 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < f9654207e92283e0acac5d64fe5f8835383b5a23 (git) |
|
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64443 (GCVE-0-2026-64443)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop
The IE parsing loop in update_beacon_info() advances by
(pIE->length + 2) each iteration but only guards on i < len.
When a malicious AP sends a Beacon whose last IE has only one byte
remaining in the frame (the element_id byte lands at len-1), the loop
reads pIE->length from one byte past the allocated receive buffer.
Additionally, even when the header bytes are in bounds, pIE->length
itself can extend the data window beyond len, passing a truncated IE
to the handler functions.
Add two guards at the top of the loop body:
1. Break if fewer than sizeof(*pIE) bytes remain (can't read header).
2. Break if the IE's declared data extends past len.
Also replace i += (pIE->length + 2) with i += sizeof(*pIE) + pIE->length
for consistency with the sizeof(*pIE) guards added above.
Severity
8.1 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25
(git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6dd5e8c3011ebabf417257d7f07901a7c4311539 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 9193c34f75fd9e1ea8a590d7cced464c3380dc29 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < bd953d52d587d42365e399b96c52dbdb13032070 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 69f174a0673b6b7a29b851adb60bc450cdc0ecc4 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < b5cc2f999927f69723ca53f1f2a3aa37dbeda907 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ed51de4a86e173c3b0ef78e039c2e49e08b11f16 (git) |
|
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64442 (GCVE-0-2026-64442)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl()
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl()
Two IE parsing loops are missing the header bounds checks before they
dereference pIE->length:
- issue_assocreq() walks pmlmeinfo->network.ies to build the
association request. If the stored IE data ends with only an
element_id byte and no length byte, pIE->length is read one byte
past the end of the buffer.
- join_cmd_hdl() walks pnetwork->ies during station join and has
the same problem under the same conditions.
Both buffers are filled from AP beacon and probe-response frames, so a
malicious AP that sends a truncated final IE can trigger the issue.
Apply the two-guard pattern established in update_beacon_info():
1. Break if fewer than sizeof(*pIE) bytes remain.
2. Break if the IE's declared data extends past the buffer end.
Severity
8.1 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
554c0a3abf216c991c5ebddcdb2c08689ecd290b , < bc881c9915c4468747d0ca5fd1abd7b313cfb0f4
(git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 605ebd94d0f469204f3c9f2f84acc71e43e2780f (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < a830bdc82461353bf7b1f8a2ad2689bf5d2de444 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 4c21eec80cf502d9ea18e0b946246b2376452786 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < c38d16b1ffac385c9e4b38447cd5c46af1114b58 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 402f13ec95945f34a210b28df1f8740d3d4a58c5 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ef61d628dfad38fead1fd2e08979ae9126d011d5 (git) |
|
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64441 (GCVE-0-2026-64441)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
staging: rtl8723bs: fix OOB reads in rtw_get_sec_ie(), rtw_get_wapi_ie(), and rtw_get_wps_attr()
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix OOB reads in rtw_get_sec_ie(), rtw_get_wapi_ie(), and rtw_get_wps_attr()
Three IE/attribute parsing functions have missing bounds checks.
rtw_get_sec_ie() and rtw_get_wapi_ie() iterate over a raw IE buffer
without verifying that the header bytes (tag + length) are within the
remaining buffer before reading them. Additionally, rtw_get_sec_ie()
compares the 4-byte WPA OUI at cnt+2 without checking that at least
6 bytes remain, and rtw_get_wapi_ie() compares a 4-byte WAPI OUI at
cnt+6 without checking that at least 10 bytes remain.
rtw_get_wps_attr() reads wps_ie[0] and wps_ie+2 unconditionally at
entry, before verifying that wps_ielen is large enough to contain
the 6-byte WPS IE header (element_id + length + 4-byte OUI). Inside
the attribute loop, get_unaligned_be16() is called on attr_ptr and
attr_ptr+2 without checking that 4 bytes remain in the buffer.
Add a cnt+2 bounds check before each loop body in rtw_get_sec_ie()
and rtw_get_wapi_ie(), guard each multi-byte comparison with a minimum
IE length requirement, add a wps_ielen < 6 early return in
rtw_get_wps_attr(), and add a 4-byte bounds check in its inner loop.
Severity
8.8 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
554c0a3abf216c991c5ebddcdb2c08689ecd290b , < efa27d487abcdec79669a60a6d94d5d6eceb7c1d
(git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 2ea1ce30ead61589214240e8d33d96310fd613e5 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < b27ecba3196f6c14e3809595ebd69c0c2392512a (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6ab1161e539fb7a1c8b35ff5a6ced4702e855b9c (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 4b51ee8a40fe47864197d73cc02b191de7a6b072 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 729c4e72563bda0f1725db1db9ea08df06f41d9b (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 1463ca3ec6601cbb097d8d87dbf5dcf1cb86a344 (git) |
|
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64440 (GCVE-0-2026-64440)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
staging: rtl8723bs: fix OOB write in HT_caps_handler()
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix OOB write in HT_caps_handler()
HT_caps_handler() iterates pIE->length bytes and writes into
HT_caps.u.HT_cap[], which is a fixed 26-byte array (sizeof struct
HT_caps_element). Because pIE->length is a raw u8 from an over-the-air
802.11 AssocResponse frame and is never validated, a malicious AP can
set it up to 255, causing up to 229 bytes of out-of-bounds writes into
adjacent fields of struct mlme_ext_info.
Truncate the iteration count to the size of HT_caps.u.HT_cap using
umin() so that data from a longer-than-expected IE is silently ignored
rather than written out of bounds, preserving interoperability with APs
that pad the element. An early return on oversized IEs was considered
but rejected: it would bypass the pmlmeinfo->HT_caps_enable = 1
assignment that precedes the loop, silently disabling HT mode for APs
that append extra bytes to the HT Capabilities IE.
Severity
8.1 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 37f642d47c3648a707df3ceb092eee1adffbfd28
(git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 8c872b47c7fc32e95e0da1db7512388794adcd69 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < bb3b942da4123b55d1cacf19d1a7d5ba15dbf83a (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 918537a0fbed85aab61fa28ad75e6279070610c9 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6f91621fc45025ad3c0be796b70e6e4cee22fc69 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 225b6d3fc7e99ac3d20b6c861d1e47d24e7ea31d (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < f8001e1a516ba3b495728c65b61f799cbfad6bd0 (git) |
|
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64439 (GCVE-0-2026-64439)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
crypto: krb5 - filter out async aead implementations at alloc
Summary
In the Linux kernel, the following vulnerability has been resolved:
crypto: krb5 - filter out async aead implementations at alloc
krb5_aead_encrypt(), krb5_aead_decrypt() in rfc3961_simplified.c and
rfc8009_encrypt(), rfc8009_decrypt() in rfc8009_aes2.c set a NULL
completion callback and treat any negative return from
crypto_aead_{encrypt,decrypt}() as terminal, falling through to
kfree_sensitive(buffer). When the encrypt_name resolves to an
async AEAD instance the request returns -EINPROGRESS, the buffer
is freed while the backend's worker still holds a pointer, and the
worker dereferences the freed slab on completion.
KASAN report under UML+SLUB with a synthetic async aead backend
bound to krb5->encrypt_name:
BUG: KASAN: slab-use-after-free in t5_stub_complete+0x7d/0xc7
The helpers were written synchronously, so filter the async
instances out at allocation time instead of plumbing
crypto_wait_req() through every call site.
Reachable via net/rxrpc/rxgk.c, fs/afs/cm_security.c and
net/ceph/crypto.c on systems with an async AEAD provider bound to
the krb5 enctype name.
Severity
9.8 (Critical)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
00244da40f7821b242c4612428d4192230dba27f , < ef6feb77e2d91761427c5b773edc9c97e1b706ad
(git)
Affected: 00244da40f7821b242c4612428d4192230dba27f , < 2b7bd6dccff14b8b632c5244f1fd506918077221 (git) Affected: 00244da40f7821b242c4612428d4192230dba27f , < 6c9dddeb582fde005360f4fe02c760d45ca05fb5 (git) |
|
| Linux | Linux |
Affected:
6.15
Unaffected: 0 , < 6.15 (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64438 (GCVE-0-2026-64438)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()
Summary
In the Linux kernel, the following vulnerability has been resolved:
crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()
The VF2PF interrupt handler queues PF-side response work that stores a
raw pointer to per-VF state (struct adf_accel_vf_info). Currently,
adf_disable_sriov() destroys per-VF mutexes and frees vf_info without
stopping new VF2PF work or waiting for in-flight workers to complete. A
concurrently scheduled or already queued worker can then dereference
freed memory.
This manifests as a use-after-free when KASAN is enabled:
BUG: KASAN: null-ptr-deref in mutex_lock+0x76/0xe0
Write of size 8 at addr 0000000000000260 by task kworker/24:2/...
Workqueue: qat_pf2vf_resp_wq adf_iov_send_resp [intel_qat]
Call Trace:
kasan_report+0x119/0x140
mutex_lock+0x76/0xe0
adf_gen4_pfvf_send+0xd4/0x1f0 [intel_qat]
adf_recv_and_handle_vf2pf_msg+0x290/0x360 [intel_qat]
adf_iov_send_resp+0x8c/0xe0 [intel_qat]
process_one_work+0x6ac/0xfd0
worker_thread+0x4dd/0xd30
kthread+0x326/0x410
ret_from_fork+0x33b/0x670
Add a PF-local flag, vf2pf_disabled, that gates work queueing, worker
processing, and interrupt re-enabling during teardown. Set this flag
atomically with the hardware interrupt mask inside
adf_disable_all_vf2pf_interrupts(). After masking, synchronize the AE
cluster MSI-X interrupt and flush the PF response workqueue before
tearing down per-VF locks and state so all in-flight work completes
before vf_info is destroyed.
Introduce adf_enable_all_vf2pf_interrupts() to clear the flag and
unmask all VF2PF interrupts under the same lock when SR-IOV is
re-enabled. This ensures the software flag and hardware state transition
atomically on both the enable and disable paths.
Severity
8.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 218c2836b3987f3fa1d9eac505462cded0821e4c
(git)
Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 446b4d77599cf1a168573f7fb32a4a6aa4f09219 (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 5d916c1eae1933511a69bffe243b4ee5d7da399c (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < f344a369d0380d54c8d6c8d24734a78dd5a89817 (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 51144032248cc4ea22917370565650670b8b4e9b (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 49cd5ac6de8de39a14ead609bb552d372d5602cd (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 6e92b28cd74fa433658efeadf21b9d4b01023d7d (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 277281c10c63791067d24d421f7c43a15faa9096 (git) |
|
| Linux | Linux |
Affected:
4.3
Unaffected: 0 , < 4.3 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qat - fix VF2PF work teardown race in adf_disable_sriov()\n\nThe VF2PF interrupt handler queues PF-side response work that stores a\nraw pointer to per-VF state (struct adf_accel_vf_info). Currently,\nadf_disable_sriov() destroys per-VF mutexes and frees vf_info without\nstopping new VF2PF work or waiting for in-flight workers to complete. A\nconcurrently scheduled or already queued worker can then dereference\nfreed memory.\n\nThis manifests as a use-after-free when KASAN is enabled:\n\n BUG: KASAN: null-ptr-deref in mutex_lock+0x76/0xe0\n Write of size 8 at addr 0000000000000260 by task kworker/24:2/...\n Workqueue: qat_pf2vf_resp_wq adf_iov_send_resp [intel_qat]\n Call Trace:\n kasan_report+0x119/0x140\n mutex_lock+0x76/0xe0\n adf_gen4_pfvf_send+0xd4/0x1f0 [intel_qat]\n adf_recv_and_handle_vf2pf_msg+0x290/0x360 [intel_qat]\n adf_iov_send_resp+0x8c/0xe0 [intel_qat]\n process_one_work+0x6ac/0xfd0\n worker_thread+0x4dd/0xd30\n kthread+0x326/0x410\n ret_from_fork+0x33b/0x670\n\nAdd a PF-local flag, vf2pf_disabled, that gates work queueing, worker\nprocessing, and interrupt re-enabling during teardown. Set this flag\natomically with the hardware interrupt mask inside\nadf_disable_all_vf2pf_interrupts(). After masking, synchronize the AE\ncluster MSI-X interrupt and flush the PF response workqueue before\ntearing down per-VF locks and state so all in-flight work completes\nbefore vf_info is destroyed.\n\nIntroduce adf_enable_all_vf2pf_interrupts() to clear the flag and\nunmask all VF2PF interrupts under the same lock when SR-IOV is\nre-enabled. This ensures the software flag and hardware state transition\natomically on both the enable and disable paths."
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}
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"url": "https://git.kernel.org/stable/c/f344a369d0380d54c8d6c8d24734a78dd5a89817"
},
{
"url": "https://git.kernel.org/stable/c/51144032248cc4ea22917370565650670b8b4e9b"
},
{
"url": "https://git.kernel.org/stable/c/49cd5ac6de8de39a14ead609bb552d372d5602cd"
},
{
"url": "https://git.kernel.org/stable/c/6e92b28cd74fa433658efeadf21b9d4b01023d7d"
},
{
"url": "https://git.kernel.org/stable/c/277281c10c63791067d24d421f7c43a15faa9096"
}
],
"title": "crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64438",
"datePublished": "2026-07-25T08:51:11.740Z",
"dateReserved": "2026-07-19T15:36:31.788Z",
"dateUpdated": "2026-08-17T04:55:39.854Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-64437 (GCVE-0-2026-64437)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
ksmbd: fix use-after-free of a deferred file_lock on SMB2_CLOSE then SMB2_CANCEL
Summary
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix use-after-free of a deferred file_lock on SMB2_CLOSE then SMB2_CANCEL
Commit f580d27e8928 ("ksmbd: fix use-after-free of a deferred file_lock on
double SMB2_CANCEL") made smb2_cancel() skip a work whose state is
KSMBD_WORK_CANCELLED, so its cancel_fn cannot be fired a second time. But
KSMBD_WORK has three states (ACTIVE, CANCELLED, CLOSED), and the same
freeing producer path is reached for CLOSED too:
SMB2_CLOSE on the locking handle -> set_close_state_blocked_works() sets
the deferred work's state to KSMBD_WORK_CLOSED and wakes the smb2_lock()
worker. The worker takes the non-ACTIVE early-exit, locks_free_lock()s
the file_lock and, because the state is not KSMBD_WORK_CANCELLED, takes
the STATUS_RANGE_NOT_LOCKED branch with "goto out2" -- which, like the
cancelled branch, skips release_async_work(). The work stays on
conn->async_requests with a live cancel_fn = smb2_remove_blocked_lock
pointing at the freed file_lock.
A subsequent SMB2_CANCEL for the same AsyncId then passes the
KSMBD_WORK_CANCELLED-only guard (its state is KSMBD_WORK_CLOSED), so
smb2_cancel() fires cancel_fn again over the freed file_lock -- the same
use-after-free fixed, via SMB2_CLOSE instead of a first SMB2_CANCEL:
BUG: KASAN: slab-use-after-free in __locks_delete_block
__locks_delete_block
locks_delete_block
ksmbd_vfs_posix_lock_unblock
smb2_remove_blocked_lock
smb2_cancel <- 2nd SMB2_CANCEL fires cancel_fn
handle_ksmbd_work
Allocated by ...: locks_alloc_lock <- smb2_lock
Freed by ...: locks_free_lock <- smb2_lock (non-ACTIVE early-exit)
... cache file_lock_cache of size 192
Reproduced on mainline 7.1-rc7 (which already contains f580d27e8928) with
KASAN by an authenticated SMB client; the double-SMB2_CANCEL control is
silent on that kernel, so the splat is attributable to the CLOSE trigger.
Only an ACTIVE deferred work may have its cancel_fn fired: both terminal
states (CANCELLED and CLOSED) reach the smb2_lock() early-exit that frees
the file_lock and skips release_async_work(). Guard on KSMBD_WORK_ACTIVE
so any non-active work is skipped.
Severity
8.8 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
b7063c7426ea5a4d15e01b60538718765392f49d , < a796ba4e61d5e14e07b79a359faac69f8f9b22a3
(git)
Affected: 0da2e073f9cbf4985a0fd9acb71bc5ff599f8afd , < b8e274e69ab09222c7a552c7c0c1eef9ce627fc1 (git) Affected: 89ae9df09d2c1fb4a4eb495c113a7ce1dca34147 , < ddb9239828336b36d8a3ef5943fdffb2f55b6508 (git) Affected: 14d2eee0193ac3cd1bf3d014373449f0b8d35d6d , < 94083db751930b1540ddff2b54d4677549c57f81 (git) Affected: f580d27e8928828693df44ba2db0fffdbe11dfea , < 12c36c99655f325befe50c26842f7deca414c381 (git) Affected: f580d27e8928828693df44ba2db0fffdbe11dfea , < 10f293a07f9e10e988b0ae44e2e99c631f5a68e0 (git) Affected: 2b2eda2821cff1d1b5a423b6ee7d8fc6fbc8e694 (git) Affected: 6.1.176 , < 6.1.178 (semver) Affected: 6.6.143 , < 6.6.145 (semver) Affected: 6.12.94 , < 6.12.96 (semver) Affected: 6.18.36 , < 6.18.39 (semver) Affected: 7.0.13 , < 7.1 (semver) |
|
| Linux | Linux |
Affected:
7.1
Unaffected: 0 , < 7.1 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free of a deferred file_lock on SMB2_CLOSE then SMB2_CANCEL\n\nCommit f580d27e8928 (\"ksmbd: fix use-after-free of a deferred file_lock on\ndouble SMB2_CANCEL\") made smb2_cancel() skip a work whose state is\nKSMBD_WORK_CANCELLED, so its cancel_fn cannot be fired a second time. But\nKSMBD_WORK has three states (ACTIVE, CANCELLED, CLOSED), and the same\nfreeing producer path is reached for CLOSED too:\n\n SMB2_CLOSE on the locking handle -\u003e set_close_state_blocked_works() sets\n the deferred work\u0027s state to KSMBD_WORK_CLOSED and wakes the smb2_lock()\n worker. The worker takes the non-ACTIVE early-exit, locks_free_lock()s\n the file_lock and, because the state is not KSMBD_WORK_CANCELLED, takes\n the STATUS_RANGE_NOT_LOCKED branch with \"goto out2\" -- which, like the\n cancelled branch, skips release_async_work(). The work stays on\n conn-\u003easync_requests with a live cancel_fn = smb2_remove_blocked_lock\n pointing at the freed file_lock.\n\nA subsequent SMB2_CANCEL for the same AsyncId then passes the\nKSMBD_WORK_CANCELLED-only guard (its state is KSMBD_WORK_CLOSED), so\nsmb2_cancel() fires cancel_fn again over the freed file_lock -- the same\nuse-after-free fixed, via SMB2_CLOSE instead of a first SMB2_CANCEL:\n\n BUG: KASAN: slab-use-after-free in __locks_delete_block\n __locks_delete_block\n locks_delete_block\n ksmbd_vfs_posix_lock_unblock\n smb2_remove_blocked_lock\n smb2_cancel \u003c- 2nd SMB2_CANCEL fires cancel_fn\n handle_ksmbd_work\n Allocated by ...: locks_alloc_lock \u003c- smb2_lock\n Freed by ...: locks_free_lock \u003c- smb2_lock (non-ACTIVE early-exit)\n ... cache file_lock_cache of size 192\n\nReproduced on mainline 7.1-rc7 (which already contains f580d27e8928) with\nKASAN by an authenticated SMB client; the double-SMB2_CANCEL control is\nsilent on that kernel, so the splat is attributable to the CLOSE trigger.\n\nOnly an ACTIVE deferred work may have its cancel_fn fired: both terminal\nstates (CANCELLED and CLOSED) reach the smb2_lock() early-exit that frees\nthe file_lock and skips release_async_work(). Guard on KSMBD_WORK_ACTIVE\nso any non-active work is skipped."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - ksmbd processes attacker-supplied SMB2 requests over TCP port 445, so the complete vulnerable path is remotely network-reachable.\nAC:L - The attacker controls the conflicting file handles, deferred LOCK, CLOSE, and CANCEL requests and can pipeline or repeat them to win the cleanup race without relying on victim-controlled conditions.\nPR:L - The sequence is post-authentication: LOCK and CLOSE require a valid SMB session, authorized tree connection, and usable file handle, but only ordinary share-user rights and no administrative capabilities.\nUI:N - No victim action is required because the authenticated SMB client can create the conflicting locks and send the complete triggering sequence.\nS:U - The corruption occurs within the host kernel serving SMB and does not inherently cross a separate virtualization, sandbox, or IOMMU security authority.\nC:H - The stale 192-byte file_lock is dereferenced through attacker-timed slab reuse, including linked-list and waitqueue pointers, making kernel-memory disclosure reasonably exploitable.\nI:H - Operations such as list unlinking and waitqueue handling on the reclaimed object can corrupt kernel pointers and potentially provide arbitrary writes or control-flow hijacking.\nA:H - The confirmed slab use-after-free can cause a kernel oops or panic, and the remote client can repeatedly trigger the sequence."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:55:38.646Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/a796ba4e61d5e14e07b79a359faac69f8f9b22a3"
},
{
"url": "https://git.kernel.org/stable/c/b8e274e69ab09222c7a552c7c0c1eef9ce627fc1"
},
{
"url": "https://git.kernel.org/stable/c/ddb9239828336b36d8a3ef5943fdffb2f55b6508"
},
{
"url": "https://git.kernel.org/stable/c/94083db751930b1540ddff2b54d4677549c57f81"
},
{
"url": "https://git.kernel.org/stable/c/12c36c99655f325befe50c26842f7deca414c381"
},
{
"url": "https://git.kernel.org/stable/c/10f293a07f9e10e988b0ae44e2e99c631f5a68e0"
}
],
"title": "ksmbd: fix use-after-free of a deferred file_lock on SMB2_CLOSE then SMB2_CANCEL",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-64437",
"datePublished": "2026-07-25T08:51:11.072Z",
"dateReserved": "2026-07-19T15:36:31.788Z",
"dateUpdated": "2026-08-17T04:55:38.646Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-64436 (GCVE-0-2026-64436)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
net: af_key: initialize alg_key_len for IPComp states
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: af_key: initialize alg_key_len for IPComp states
pfkey_msg2xfrm_state() handles the IPComp (SADB_X_SATYPE_IPCOMP) case by
allocating x->calg and copying only the algorithm name:
x->calg = kmalloc_obj(*x->calg);
if (!x->calg) {
err = -ENOMEM;
goto out;
}
strcpy(x->calg->alg_name, a->name);
x->props.calgo = sa->sadb_sa_encrypt;
Unlike the authentication (x->aalg) and encryption (x->ealg) branches of
the same function, the compression branch never initializes
calg->alg_key_len. IPComp carries no key and the allocation only
reserves sizeof(struct xfrm_algo) (i.e. no room for a key), so the field
is left containing uninitialized slab data.
calg->alg_key_len is later used as a length by xfrm_algo_clone() when an
IPComp state is cloned during XFRM_MSG_MIGRATE:
xfrm_state_migrate()
xfrm_state_clone_and_setup()
x->calg = xfrm_algo_clone(orig->calg);
kmemdup(orig, xfrm_alg_len(orig));
where xfrm_alg_len() returns sizeof(*alg) + (alg_key_len + 7) / 8. With
a non-zero garbage alg_key_len, kmemdup() reads past the end of the
68-byte calg object. Adding an IPComp SA via PF_KEY and then migrating
it triggers (net-next, KASAN, init_on_alloc=0):
BUG: KASAN: slab-out-of-bounds in kmemdup_noprof+0x44/0x60
Read of size 4164 at addr ff11000025a74980 by task diag2/9287
CPU: 3 UID: 0 PID: 9287 Comm: diag2 7.1.0-rc6-g903db046d557 #1
Call Trace:
<TASK>
dump_stack_lvl+0x10e/0x1f0
print_report+0xf7/0x600
kasan_report+0xe4/0x120
kasan_check_range+0x105/0x1b0
__asan_memcpy+0x23/0x60
kmemdup_noprof+0x44/0x60
xfrm_state_migrate+0x70a/0x1da0
xfrm_migrate+0x753/0x18a0
xfrm_do_migrate+0xb47/0xf10
xfrm_user_rcv_msg+0x411/0xb50
netlink_rcv_skb+0x158/0x420
xfrm_netlink_rcv+0x71/0x90
netlink_unicast+0x584/0x850
netlink_sendmsg+0x8b0/0xdc0
____sys_sendmsg+0x9f7/0xb90
___sys_sendmsg+0x134/0x1d0
__sys_sendmsg+0x16d/0x220
do_syscall_64+0x116/0x7d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
</TASK>
Allocated by task 9287:
kasan_save_stack+0x33/0x60
kasan_save_track+0x14/0x30
__kasan_kmalloc+0xaa/0xb0
pfkey_add+0x2652/0x2ea0
pfkey_process+0x6d0/0x830
pfkey_sendmsg+0x42c/0x850
__sys_sendto+0x461/0x4b0
__x64_sys_sendto+0xe0/0x1c0
do_syscall_64+0x116/0x7d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ff11000025a74980
which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
allocated 68-byte region [ff11000025a74980, ff11000025a749c4)
Depending on the uninitialized value the same field can instead request
an oversized kmemdup() allocation and make the migration clone fail.
The XFRM netlink path is not affected: verify_one_alg() rejects an
XFRMA_ALG_COMP attribute shorter than xfrm_alg_len(), so a calg added via
XFRM_MSG_NEWSA is always self-consistent.
Initialize calg->alg_key_len to 0, matching the aalg/ealg branches.
Severity
7.1 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
80c9abaabf4283f7cf4a0b3597cd302506635b7f , < 58e82fc3dedb57b1432292504415b224fd2d6acb
(git)
Affected: 80c9abaabf4283f7cf4a0b3597cd302506635b7f , < 01b9115b55018123ef2449ac4951f89147a8428e (git) Affected: 80c9abaabf4283f7cf4a0b3597cd302506635b7f , < 3f63d1752d90c0e28be931a48ab5d89bc97d637d (git) Affected: 80c9abaabf4283f7cf4a0b3597cd302506635b7f , < 273c06b81d2e902b21acc801ae18c8276c8a9b69 (git) Affected: 80c9abaabf4283f7cf4a0b3597cd302506635b7f , < 6de2a650917bedaaefd65b17cede83c5e2c1dedd (git) Affected: 80c9abaabf4283f7cf4a0b3597cd302506635b7f , < e8417353cbd078d10531ba3928e609c84ab09e6b (git) Affected: 80c9abaabf4283f7cf4a0b3597cd302506635b7f , < cea34abc94b0a81e3a8b5cfb41cf45af37c2c67e (git) Affected: 80c9abaabf4283f7cf4a0b3597cd302506635b7f , < d129c3177d7b1138fd5066fcc63a698b3ba415b0 (git) |
|
| Linux | Linux |
Affected:
2.6.21
Unaffected: 0 , < 2.6.21 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
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"programFiles": [
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],
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"vendor": "Linux",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: af_key: initialize alg_key_len for IPComp states\n\npfkey_msg2xfrm_state() handles the IPComp (SADB_X_SATYPE_IPCOMP) case by\nallocating x-\u003ecalg and copying only the algorithm name:\n\n\tx-\u003ecalg = kmalloc_obj(*x-\u003ecalg);\n\tif (!x-\u003ecalg) {\n\t\terr = -ENOMEM;\n\t\tgoto out;\n\t}\n\tstrcpy(x-\u003ecalg-\u003ealg_name, a-\u003ename);\n\tx-\u003eprops.calgo = sa-\u003esadb_sa_encrypt;\n\nUnlike the authentication (x-\u003eaalg) and encryption (x-\u003eealg) branches of\nthe same function, the compression branch never initializes\ncalg-\u003ealg_key_len. IPComp carries no key and the allocation only\nreserves sizeof(struct xfrm_algo) (i.e. no room for a key), so the field\nis left containing uninitialized slab data.\n\ncalg-\u003ealg_key_len is later used as a length by xfrm_algo_clone() when an\nIPComp state is cloned during XFRM_MSG_MIGRATE:\n\n\txfrm_state_migrate()\n\t xfrm_state_clone_and_setup()\n\t x-\u003ecalg = xfrm_algo_clone(orig-\u003ecalg);\n\t kmemdup(orig, xfrm_alg_len(orig));\n\nwhere xfrm_alg_len() returns sizeof(*alg) + (alg_key_len + 7) / 8. With\na non-zero garbage alg_key_len, kmemdup() reads past the end of the\n68-byte calg object. Adding an IPComp SA via PF_KEY and then migrating\nit triggers (net-next, KASAN, init_on_alloc=0):\n\n BUG: KASAN: slab-out-of-bounds in kmemdup_noprof+0x44/0x60\n Read of size 4164 at addr ff11000025a74980 by task diag2/9287\n CPU: 3 UID: 0 PID: 9287 Comm: diag2 7.1.0-rc6-g903db046d557 #1\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x10e/0x1f0\n print_report+0xf7/0x600\n kasan_report+0xe4/0x120\n kasan_check_range+0x105/0x1b0\n __asan_memcpy+0x23/0x60\n kmemdup_noprof+0x44/0x60\n xfrm_state_migrate+0x70a/0x1da0\n xfrm_migrate+0x753/0x18a0\n xfrm_do_migrate+0xb47/0xf10\n xfrm_user_rcv_msg+0x411/0xb50\n netlink_rcv_skb+0x158/0x420\n xfrm_netlink_rcv+0x71/0x90\n netlink_unicast+0x584/0x850\n netlink_sendmsg+0x8b0/0xdc0\n ____sys_sendmsg+0x9f7/0xb90\n ___sys_sendmsg+0x134/0x1d0\n __sys_sendmsg+0x16d/0x220\n do_syscall_64+0x116/0x7d0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n \u003c/TASK\u003e\n\n Allocated by task 9287:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0xaa/0xb0\n pfkey_add+0x2652/0x2ea0\n pfkey_process+0x6d0/0x830\n pfkey_sendmsg+0x42c/0x850\n __sys_sendto+0x461/0x4b0\n __x64_sys_sendto+0xe0/0x1c0\n do_syscall_64+0x116/0x7d0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n The buggy address belongs to the object at ff11000025a74980\n which belongs to the cache kmalloc-96 of size 96\n The buggy address is located 0 bytes inside of\n allocated 68-byte region [ff11000025a74980, ff11000025a749c4)\n\nDepending on the uninitialized value the same field can instead request\nan oversized kmemdup() allocation and make the migration clone fail.\n\nThe XFRM netlink path is not affected: verify_one_alg() rejects an\nXFRMA_ALG_COMP attribute shorter than xfrm_alg_len(), so a calg added via\nXFRM_MSG_NEWSA is always self-consistent.\n\nInitialize calg-\u003ealg_key_len to 0, matching the aalg/ealg branches."
}
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"cvssV3_1": {
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"scenarios": [
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"lang": "en",
"value": "AV:L - Exploitation requires local PF_KEY and XFRM netlink messages; received IPComp network packets cannot create or migrate the vulnerable state.\nAC:L - The attacker can deterministically prime the same kmalloc-96 cache and control the stale length before triggering migration. No race or victim-controlled condition is required.\nPR:L - Both paths require CAP_NET_ADMIN relative to the network namespace\u0027s owning user namespace. An unprivileged user can obtain this capability in a newly created user and network namespace.\nUI:N - No victim action is required after the attacker gains local execution and submits the crafted state and migration messages.\nS:U - The vulnerability affects the host kernel within its existing security authority and does not cross a VM, IOMMU, or equivalent scope boundary.\nC:H - The controlled length causes a potentially large out-of-bounds read across adjacent kernel heap objects, which can capture sensitive kernel memory and is not tightly bounded.\nI:N - kmemdup allocates a destination matching the computed length, and the vulnerable operation only over-reads the source. No out-of-bounds write or control-flow modification path was identified.\nA:H - The over-read can trigger a kernel fault or panic under memory-safety enforcement. Controlled oversized clone allocations can also be repeated across states to exhaust kernel memory."
}
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"title": "net: af_key: initialize alg_key_len for IPComp states",
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CVE-2026-64435 (GCVE-0-2026-64435)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
audit: Fix data races of skb_queue_len() readers on audit_queue
Summary
In the Linux kernel, the following vulnerability has been resolved:
audit: Fix data races of skb_queue_len() readers on audit_queue
Multiple readers access audit_queue.qlen via skb_queue_len() without
holding the queue lock or using READ_ONCE(), while kauditd writes to
this field via the skb_dequeue() → __skb_unlink() path with WRITE_ONCE()
protected by a spinlock. This constitutes data races.
All affected skb_queue_len(&audit_queue) call sites:
- kauditd_thread() wait_event_freezable() condition
- audit_receive_msg() AUDIT_GET handler (s.backlog assignment)
- audit_receive() backlog check
- audit_log_start() backlog check and pr_warn()
KCSAN reports the following conflicting access pattern (one example):
==================================================================
BUG: KCSAN: data-race in audit_log_start / skb_dequeue
write (marked) to 0xffffffff8512ee20 of 4 bytes by task 661 on cpu 57:
skb_dequeue+0x70/0xf0
kauditd_send_queue+0x71/0x220
kauditd_thread+0x1cb/0x430
kthread+0x1c2/0x210
ret_from_fork+0x162/0x1a0
ret_from_fork_asm+0x1a/0x30
read to 0xffffffff8512ee20 of 4 bytes by task 36586 on cpu 1:
audit_log_start+0x2a0/0x6b0
audit_core_dumps+0x64/0xa0
do_coredump+0x14b/0x1260
get_signal+0xeb2/0xf70
arch_do_signal_or_restart+0x41/0x170
exit_to_user_mode_loop+0xa2/0x1c0
do_syscall_64+0x1a3/0x1c0
entry_SYSCALL_64_after_hwframe+0x76/0xe0
value changed: 0x00000001 -> 0x00000000
==================================================================
Resolve the race by switching to lockless helper skb_queue_len_lockless(),
which internally uses READ_ONCE() and properly pairs with the WRITE_ONCE()
write accesses already present on the writer side.
[PM: line length tweak]
Severity
8.2 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
3197542482df22c2a131d4a813280bd7c54cedf5 , < 69f98fff30bdaa72b0cb0e7e078ab6456a0a59b0
(git)
Affected: 3197542482df22c2a131d4a813280bd7c54cedf5 , < b35597bdae1a5d8395da4b9baa993b9b71f74d68 (git) Affected: 3197542482df22c2a131d4a813280bd7c54cedf5 , < e575dabb805252e3113fdc3f56f6ecacfde422d0 (git) Affected: 3197542482df22c2a131d4a813280bd7c54cedf5 , < 7ff42312ccde549f8c698723822c7db35107a39b (git) Affected: 3197542482df22c2a131d4a813280bd7c54cedf5 , < a3d85dec60bb0622360fc176b2a51abdbe2ff0ad (git) Affected: 3197542482df22c2a131d4a813280bd7c54cedf5 , < fe997a84a385f840b593ead92e575503a5046cee (git) Affected: 3197542482df22c2a131d4a813280bd7c54cedf5 , < c5186201fa7030289cc4fe23fae87a3fcb566856 (git) Affected: 3197542482df22c2a131d4a813280bd7c54cedf5 , < c9a71daaecb2fb1d8c704545cc0b1c920b9bf5d7 (git) |
|
| Linux | Linux |
Affected:
4.10
Unaffected: 0 , < 4.10 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\naudit: Fix data races of skb_queue_len() readers on audit_queue\n\nMultiple readers access audit_queue.qlen via skb_queue_len() without\nholding the queue lock or using READ_ONCE(), while kauditd writes to\nthis field via the skb_dequeue() \u2192 __skb_unlink() path with WRITE_ONCE()\nprotected by a spinlock. This constitutes data races.\n\nAll affected skb_queue_len(\u0026audit_queue) call sites:\n - kauditd_thread() wait_event_freezable() condition\n - audit_receive_msg() AUDIT_GET handler (s.backlog assignment)\n - audit_receive() backlog check\n - audit_log_start() backlog check and pr_warn()\n\nKCSAN reports the following conflicting access pattern (one example):\n==================================================================\nBUG: KCSAN: data-race in audit_log_start / skb_dequeue\n\nwrite (marked) to 0xffffffff8512ee20 of 4 bytes by task 661 on cpu 57:\n skb_dequeue+0x70/0xf0\n kauditd_send_queue+0x71/0x220\n kauditd_thread+0x1cb/0x430\n kthread+0x1c2/0x210\n ret_from_fork+0x162/0x1a0\n ret_from_fork_asm+0x1a/0x30\n\nread to 0xffffffff8512ee20 of 4 bytes by task 36586 on cpu 1:\n audit_log_start+0x2a0/0x6b0\n audit_core_dumps+0x64/0xa0\n do_coredump+0x14b/0x1260\n get_signal+0xeb2/0xf70\n arch_do_signal_or_restart+0x41/0x170\n exit_to_user_mode_loop+0xa2/0x1c0\n do_syscall_64+0x1a3/0x1c0\n entry_SYSCALL_64_after_hwframe+0x76/0xe0\n\nvalue changed: 0x00000001 -\u003e 0x00000000\n==================================================================\n\nResolve the race by switching to lockless helper skb_queue_len_lockless(),\nwhich internally uses READ_ONCE() and properly pairs with the WRITE_ONCE()\nwrite accesses already present on the writer side.\n\n[PM: line length tweak]"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.2,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - Unauthenticated packets matching a pre-existing nftables audit-level logging or xtables AUDIT rule reach audit_log_start() through the network receive and netfilter paths.\nAC:L - Parallel matching traffic invokes the vulnerable readers while feeding and waking kauditd, allowing the attacker to repeatedly drive both sides of the race.\nPR:N - The audit rule must already be configured, but the remote attacker needs no credentials or capabilities to send matching packets.\nUI:N - No victim action is required after the affected network-audit configuration is active.\nS:U - The race and its effects remain within the host kernel and its audit security authority.\nC:N - The raced value is only the 32-bit queue length; no pointer, packet contents, or adjacent memory is disclosed.\nI:L - An incorrect backlog decision can delay or discard audit records, causing limited corruption of the security audit trail without an arbitrary-write primitive.\nA:H - In hardened systems using AUDIT_FAIL_PANIC, a raced queue length interpreted as exceeding the limit from the GFP_ATOMIC packet-audit path calls audit_log_lost() and can panic the kernel."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:55:36.444Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/69f98fff30bdaa72b0cb0e7e078ab6456a0a59b0"
},
{
"url": "https://git.kernel.org/stable/c/b35597bdae1a5d8395da4b9baa993b9b71f74d68"
},
{
"url": "https://git.kernel.org/stable/c/e575dabb805252e3113fdc3f56f6ecacfde422d0"
},
{
"url": "https://git.kernel.org/stable/c/7ff42312ccde549f8c698723822c7db35107a39b"
},
{
"url": "https://git.kernel.org/stable/c/a3d85dec60bb0622360fc176b2a51abdbe2ff0ad"
},
{
"url": "https://git.kernel.org/stable/c/fe997a84a385f840b593ead92e575503a5046cee"
},
{
"url": "https://git.kernel.org/stable/c/c5186201fa7030289cc4fe23fae87a3fcb566856"
},
{
"url": "https://git.kernel.org/stable/c/c9a71daaecb2fb1d8c704545cc0b1c920b9bf5d7"
}
],
"title": "audit: Fix data races of skb_queue_len() readers on audit_queue",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64435",
"datePublished": "2026-07-25T08:51:09.688Z",
"dateReserved": "2026-07-19T15:36:31.787Z",
"dateUpdated": "2026-08-17T04:55:36.444Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-64434 (GCVE-0-2026-64434)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-19 16:28
VLAI
EPSS
VEX
Title
Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref
l2cap_chan_timeout() runs asynchronously and accesses chan->conn. If
the connection is torn down while the timer is running or pending,
chan->conn can be freed, leading to a use-after-free when the timer
worker attempts to lock conn->lock:
| BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:112 [inline]
| BUG: KASAN: slab-use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]
| BUG: KASAN: slab-use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]
| BUG: KASAN: slab-use-after-free in mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318
| Write of size 8 at addr ffff8881298d9550 by task kworker/2:1/83
|
| CPU: 2 UID: 0 PID: 83 Comm: kworker/2:1 Not tainted 7.1.0-rc6-next-20260601-dirty #6 PREEMPT(full)
| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014
| Workqueue: events l2cap_chan_timeout
| Call Trace:
| <TASK>
| instrument_atomic_read_write include/linux/instrumented.h:112 [inline]
| atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]
| __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]
| mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318
| l2cap_chan_timeout+0x5d/0x1b0 net/bluetooth/l2cap_core.c:422
| process_one_work kernel/workqueue.c:3326 [inline]
| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409
| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490
| kthread+0x346/0x430 kernel/kthread.c:436
| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158
| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
| </TASK>
|
| Allocated by task 320:
| l2cap_conn_add+0xa7/0x820 net/bluetooth/l2cap_core.c:7075
| l2cap_connect_cfm+0xdb/0xd70 net/bluetooth/l2cap_core.c:7452
| hci_connect_cfm include/net/bluetooth/hci_core.h:2139 [inline]
| hci_remote_features_evt+0x52f/0x9f0 net/bluetooth/hci_event.c:3760
| hci_event_func net/bluetooth/hci_event.c:7796 [inline]
| hci_event_packet+0x561/0xa70 net/bluetooth/hci_event.c:7847
| hci_rx_work+0x370/0x890 net/bluetooth/hci_core.c:4040
| process_one_work kernel/workqueue.c:3326 [inline]
| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409
| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490
| kthread+0x346/0x430 kernel/kthread.c:436
| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158
| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
|
| Freed by task 322:
| hci_disconn_cfm include/net/bluetooth/hci_core.h:2154 [inline]
| hci_conn_hash_flush+0x101/0x1f0 net/bluetooth/hci_conn.c:2736
| hci_dev_close_sync+0x889/0xde0 net/bluetooth/hci_sync.c:5405
| hci_dev_do_close net/bluetooth/hci_core.c:502 [inline]
| hci_unregister_dev+0x1f7/0x370 net/bluetooth/hci_core.c:2679
| vhci_release+0x12a/0x180 drivers/bluetooth/hci_vhci.c:690
| __fput+0x369/0x890 fs/file_table.c:510
| task_work_run+0x160/0x1d0 kernel/task_work.c:233
| get_signal+0xf5b/0x1120 kernel/signal.c:2810
| arch_do_signal_or_restart+0x4d/0x600 arch/x86/kernel/signal.c:337
| __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
| exit_to_user_mode_loop+0x85/0x510 kernel/entry/common.c:98
| do_syscall_64+0x263/0x3d0 arch/x86/entry/syscall_64.c:100
| entry_SYSCALL_64_after_hwframe+0x77/0x7f
|
| The buggy address belongs to the object at ffff8881298d9400
| which belongs to the cache kmalloc-512 of size 512
| The buggy address is located 336 bytes inside of
| freed 512-byte region [ffff8881298d9400, ffff8881298d9600)
Fix it by having chan->conn hold a reference to l2cap_conn (via
l2cap_conn_get) when the channel is added to the connection, and
releasing it in the channel destructor. This ensures the l2cap_conn
remains alive as long as the channel exists.
A new FLAG_DEL channel flag is introduced to indicate that the ch
---truncated---
Severity
8.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
3634cbdc2eb414b69ffa752ddbe5e0458518e321 , < 8f90405a4a6f1f1880dc07996b47bf57c712bd8a
(git)
Affected: e1c100e2d61bd8c718b7d91fe3e050780a9bf72d , < 32d783cafb46ff3ca58e6f9fd62c9c5f35eaf26b (git) Affected: deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9 , < 8922c7940bae9ce4b1736dddb6362370793835c2 (git) Affected: 89dec92041717b027216e110599e4f6d6c921b79 , < 91047a4396a8b1857a6f712a90cf33ec0012b189 (git) Affected: 50dfec218808b148ab4247b1858031b7a32015c5 , < 0b0e2bf39cf99e458d991b9df253727e036a7d7d (git) Affected: 859d3ace791ed878ae9ba5522c7844d960da8f88 , < d3b739db5dc6f688a60d56da872fabaf65246032 (git) Affected: 8c8e620467a7b51562dbcefbd1f09f288d7d710d , < 50c38d9f42a529691e4e67ea9cedf4f0bfc8d277 (git) Affected: 8c8e620467a7b51562dbcefbd1f09f288d7d710d , < b66774b48dd98f07254951f74ea6f513efe7ff8b (git) Affected: 7555fd885a0603f50e49a655850a1f2bd8a25398 (git) Affected: 5.10.259 , < 5.10.265 (semver) Affected: 5.15.210 , < 5.15.216 (semver) Affected: 6.1.176 , < 6.1.183 (semver) Affected: 6.6.143 , < 6.6.145 (semver) Affected: 6.12.93 , < 6.12.97 (semver) Affected: 6.18.35 , < 6.18.39 (semver) Affected: 7.0.12 , < 7.1 (semver) |
|
| Linux | Linux |
Affected:
7.1
Unaffected: 0 , < 7.1 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref\n\nl2cap_chan_timeout() runs asynchronously and accesses chan-\u003econn. If\nthe connection is torn down while the timer is running or pending,\nchan-\u003econn can be freed, leading to a use-after-free when the timer\nworker attempts to lock conn-\u003elock:\n\n| BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:112 [inline]\n| BUG: KASAN: slab-use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]\n| BUG: KASAN: slab-use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]\n| BUG: KASAN: slab-use-after-free in mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318\n| Write of size 8 at addr ffff8881298d9550 by task kworker/2:1/83\n|\n| CPU: 2 UID: 0 PID: 83 Comm: kworker/2:1 Not tainted 7.1.0-rc6-next-20260601-dirty #6 PREEMPT(full)\n| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\n| Workqueue: events l2cap_chan_timeout\n| Call Trace:\n| \u003cTASK\u003e\n| instrument_atomic_read_write include/linux/instrumented.h:112 [inline]\n| atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4456 [inline]\n| __mutex_trylock_fast kernel/locking/mutex.c:161 [inline]\n| mutex_lock+0x4f/0xa0 kernel/locking/mutex.c:318\n| l2cap_chan_timeout+0x5d/0x1b0 net/bluetooth/l2cap_core.c:422\n| process_one_work kernel/workqueue.c:3326 [inline]\n| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409\n| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490\n| kthread+0x346/0x430 kernel/kthread.c:436\n| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158\n| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n| \u003c/TASK\u003e\n|\n| Allocated by task 320:\n| l2cap_conn_add+0xa7/0x820 net/bluetooth/l2cap_core.c:7075\n| l2cap_connect_cfm+0xdb/0xd70 net/bluetooth/l2cap_core.c:7452\n| hci_connect_cfm include/net/bluetooth/hci_core.h:2139 [inline]\n| hci_remote_features_evt+0x52f/0x9f0 net/bluetooth/hci_event.c:3760\n| hci_event_func net/bluetooth/hci_event.c:7796 [inline]\n| hci_event_packet+0x561/0xa70 net/bluetooth/hci_event.c:7847\n| hci_rx_work+0x370/0x890 net/bluetooth/hci_core.c:4040\n| process_one_work kernel/workqueue.c:3326 [inline]\n| process_scheduled_works+0x7c8/0xfb0 kernel/workqueue.c:3409\n| worker_thread+0x8a9/0xcf0 kernel/workqueue.c:3490\n| kthread+0x346/0x430 kernel/kthread.c:436\n| ret_from_fork+0x1a3/0x470 arch/x86/kernel/process.c:158\n| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n|\n| Freed by task 322:\n| hci_disconn_cfm include/net/bluetooth/hci_core.h:2154 [inline]\n| hci_conn_hash_flush+0x101/0x1f0 net/bluetooth/hci_conn.c:2736\n| hci_dev_close_sync+0x889/0xde0 net/bluetooth/hci_sync.c:5405\n| hci_dev_do_close net/bluetooth/hci_core.c:502 [inline]\n| hci_unregister_dev+0x1f7/0x370 net/bluetooth/hci_core.c:2679\n| vhci_release+0x12a/0x180 drivers/bluetooth/hci_vhci.c:690\n| __fput+0x369/0x890 fs/file_table.c:510\n| task_work_run+0x160/0x1d0 kernel/task_work.c:233\n| get_signal+0xf5b/0x1120 kernel/signal.c:2810\n| arch_do_signal_or_restart+0x4d/0x600 arch/x86/kernel/signal.c:337\n| __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]\n| exit_to_user_mode_loop+0x85/0x510 kernel/entry/common.c:98\n| do_syscall_64+0x263/0x3d0 arch/x86/entry/syscall_64.c:100\n| entry_SYSCALL_64_after_hwframe+0x77/0x7f\n|\n| The buggy address belongs to the object at ffff8881298d9400\n| which belongs to the cache kmalloc-512 of size 512\n| The buggy address is located 336 bytes inside of\n| freed 512-byte region [ffff8881298d9400, ffff8881298d9600)\n\nFix it by having chan-\u003econn hold a reference to l2cap_conn (via\nl2cap_conn_get) when the channel is added to the connection, and\nreleasing it in the channel destructor. This ensures the l2cap_conn\nremains alive as long as the channel exists.\n\nA new FLAG_DEL channel flag is introduced to indicate that the ch\n---truncated---"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - An unauthenticated Bluetooth peer within radio range can reach the vulnerable worker by creating a half-configured L2CAP channel and subsequently terminating the ACL connection.\nAC:L - The attacker controls both channel creation and connection teardown, can leave the 40-second channel timer armed, and can repeat or parallelize attempts to win the race.\nPR:N - The BR/EDR signaling path processes incoming L2CAP requests before application acceptance, and an SDP listener permits this path without pairing or authentication.\nUI:N - Exploitation requires no victim action because an already-running Bluetooth service and the kernel independently process the connection, timer, and disconnection.\nS:U - The UAF compromises the host kernel within the same security authority and does not inherently cross a VM, IOMMU, or comparable boundary.\nC:H - The freed kmalloc object can be reclaimed with attacker-influenced contents, allowing the UAF to support kernel-memory disclosure primitives.\nI:H - The worker performs mutex writes into the freed allocation, enabling heap corruption and potentially arbitrary write or kernel control-flow hijacking after heap grooming.\nA:H - The stale mutex access can corrupt memory, trigger an oops or panic, and can be retriggered by a nearby Bluetooth peer."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:28:16.061Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/8f90405a4a6f1f1880dc07996b47bf57c712bd8a"
},
{
"url": "https://git.kernel.org/stable/c/32d783cafb46ff3ca58e6f9fd62c9c5f35eaf26b"
},
{
"url": "https://git.kernel.org/stable/c/8922c7940bae9ce4b1736dddb6362370793835c2"
},
{
"url": "https://git.kernel.org/stable/c/91047a4396a8b1857a6f712a90cf33ec0012b189"
},
{
"url": "https://git.kernel.org/stable/c/0b0e2bf39cf99e458d991b9df253727e036a7d7d"
},
{
"url": "https://git.kernel.org/stable/c/d3b739db5dc6f688a60d56da872fabaf65246032"
},
{
"url": "https://git.kernel.org/stable/c/50c38d9f42a529691e4e67ea9cedf4f0bfc8d277"
},
{
"url": "https://git.kernel.org/stable/c/b66774b48dd98f07254951f74ea6f513efe7ff8b"
}
],
"title": "Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64434",
"datePublished": "2026-07-25T08:51:09.066Z",
"dateReserved": "2026-07-19T15:36:31.787Z",
"dateUpdated": "2026-08-19T16:28:16.061Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-64433 (GCVE-0-2026-64433)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
Bluetooth: MGMT: Fix UAF of hci_conn_params in add_device_complete
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: MGMT: Fix UAF of hci_conn_params in add_device_complete
add_device_complete() runs from the hci_cmd_sync_work kworker, which
holds only hci_req_sync_lock and *not* hci_dev_lock. It calls
hci_conn_params_lookup() and then dereferences the returned object
(params->flags) without taking hci_dev_lock:
params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
le_addr_type(cp->addr.type));
...
device_flags_changed(NULL, hdev, &cp->addr.bdaddr,
cp->addr.type, hdev->conn_flags,
params ? params->flags : 0);
hci_conn_params_lookup() walks hdev->le_conn_params and is documented to
require hdev->lock. A concurrent MGMT_OP_REMOVE_DEVICE
(remove_device()), which does run under hci_dev_lock, can call
hci_conn_params_free() to list_del() and kfree() the very object the
lookup returned, so the subsequent params->flags read touches freed
memory [0].
Hold hci_dev_lock() across the hci_conn_params_lookup() and the read of
params->flags (and the matching event emission) so the lookup result
cannot be freed by a concurrent remove_device() before it is used,
honouring the locking contract of hci_conn_params_lookup().
[0]: (trailing page/memory-state dump trimmed)
BUG: KASAN: slab-use-after-free in add_device_complete+0x358/0x3d8 net/bluetooth/mgmt.c:7671
Read of size 1 at addr ffff000017ab26c1 by task kworker/u9:8/388
CPU: 1 UID: 0 PID: 388 Comm: kworker/u9:8 Not tainted 7.0.11 #20 PREEMPT
Hardware name: linux,dummy-virt (DT)
Workqueue: hci0 hci_cmd_sync_work
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0xb4/0xd4 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0x118/0x5d8 mm/kasan/report.c:482
kasan_report+0xb0/0xf4 mm/kasan/report.c:595
__asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
add_device_complete+0x358/0x3d8 net/bluetooth/mgmt.c:7671
hci_cmd_sync_work+0x14c/0x240 net/bluetooth/hci_sync.c:334
process_one_work+0x628/0xd38 kernel/workqueue.c:3289
process_scheduled_works kernel/workqueue.c:3372 [inline]
worker_thread+0x7a8/0xac0 kernel/workqueue.c:3453
kthread+0x39c/0x444 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
Allocated by task 3401:
kasan_save_stack+0x3c/0x64 mm/kasan/common.c:57
kasan_save_track+0x20/0x3c mm/kasan/common.c:78
kasan_save_alloc_info+0x40/0x54 mm/kasan/generic.c:570
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0xd4/0xd8 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x1b0/0x458 mm/slub.c:5385
kmalloc_noprof include/linux/slab.h:950 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
hci_conn_params_add+0x10c/0x4b0 net/bluetooth/hci_core.c:2279
hci_conn_params_set net/bluetooth/mgmt.c:5162 [inline]
add_device+0x5b4/0xa54 net/bluetooth/mgmt.c:7755
hci_mgmt_cmd net/bluetooth/hci_sock.c:1721 [inline]
hci_sock_sendmsg+0x10b4/0x1dd0 net/bluetooth/hci_sock.c:1841
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg+0xe0/0x128 net/socket.c:742
sock_write_iter+0x250/0x390 net/socket.c:1195
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x66c/0xab0 fs/read_write.c:688
ksys_write+0x1fc/0x24c fs/read_write.c:740
__do_sys_write fs/read_write.c:751 [inline]
__se_sys_write fs/read_write.c:748 [inline]
__arm64_sys_write+0x70/0xa4 fs/read_write.c:748
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x84/0x2a8 arch/arm64/kernel/syscall.c:49
el0_svc_common.constprop.0+0xe4/0x294 arch/arm64/kernel/syscall.c:132
do_el0_svc+0x44/0x5c arch/arm64/kernel/syscall.c:151
el0_svc+0x38/0xac arch/arm64/kernel/entry-common.c:724
el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:743
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Freed by task 3740:
kasan_save_stack+0x3c/0x64
---truncated---
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
31492b8386e5a243df26ca4a9421f6b041f414d5 , < caed4a96d55757c139a899744657c032b6186665
(git)
Affected: 28826a89fdfd49f3291980c2e68b8a7c5d55e199 , < e4369e4e970f3fa4676b76be14c1d315c87f22b6 (git) Affected: 1e2e3044c1bc64a64aa0eaf7c17f7832c26c9775 , < b346efa825b5e4386f19bc63f81141652d496ec4 (git) Affected: 1e2e3044c1bc64a64aa0eaf7c17f7832c26c9775 , < 9531014c60c804e16099885d4a98aedcf31bce8d (git) Affected: 1e2e3044c1bc64a64aa0eaf7c17f7832c26c9775 , < fa85d985f614bc3feb343000f14a1072e99b0df1 (git) Affected: 7e370545b8bdb54ed7f1ae485d6d24d3b62a0b53 (git) Affected: 6.6.92 , < 6.6.145 (semver) Affected: 6.12.30 , < 6.12.96 (semver) Affected: 6.14.8 , < 6.15 (semver) |
|
| Linux | Linux |
Affected:
6.15
Unaffected: 0 , < 6.15 (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/bluetooth/mgmt.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "caed4a96d55757c139a899744657c032b6186665",
"status": "affected",
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"versionType": "git"
},
{
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"versionType": "git"
},
{
"lessThan": "b346efa825b5e4386f19bc63f81141652d496ec4",
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"versionType": "git"
},
{
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"versionType": "git"
},
{
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"status": "affected",
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},
{
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},
{
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"versionType": "semver"
},
{
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"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"lessThan": "6.15",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "6.6.92",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.96",
"versionStartIncluding": "6.12.30",
"vulnerable": true
},
{
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},
{
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix UAF of hci_conn_params in add_device_complete\n\nadd_device_complete() runs from the hci_cmd_sync_work kworker, which\nholds only hci_req_sync_lock and *not* hci_dev_lock. It calls\nhci_conn_params_lookup() and then dereferences the returned object\n(params-\u003eflags) without taking hci_dev_lock:\n\n\tparams = hci_conn_params_lookup(hdev, \u0026cp-\u003eaddr.bdaddr,\n\t\t\t\t\tle_addr_type(cp-\u003eaddr.type));\n\t...\n\tdevice_flags_changed(NULL, hdev, \u0026cp-\u003eaddr.bdaddr,\n\t\t\t cp-\u003eaddr.type, hdev-\u003econn_flags,\n\t\t\t params ? params-\u003eflags : 0);\n\nhci_conn_params_lookup() walks hdev-\u003ele_conn_params and is documented to\nrequire hdev-\u003elock. A concurrent MGMT_OP_REMOVE_DEVICE\n(remove_device()), which does run under hci_dev_lock, can call\nhci_conn_params_free() to list_del() and kfree() the very object the\nlookup returned, so the subsequent params-\u003eflags read touches freed\nmemory [0].\n\nHold hci_dev_lock() across the hci_conn_params_lookup() and the read of\nparams-\u003eflags (and the matching event emission) so the lookup result\ncannot be freed by a concurrent remove_device() before it is used,\nhonouring the locking contract of hci_conn_params_lookup().\n\n[0]: (trailing page/memory-state dump trimmed)\nBUG: KASAN: slab-use-after-free in add_device_complete+0x358/0x3d8 net/bluetooth/mgmt.c:7671\nRead of size 1 at addr ffff000017ab26c1 by task kworker/u9:8/388\n\nCPU: 1 UID: 0 PID: 388 Comm: kworker/u9:8 Not tainted 7.0.11 #20 PREEMPT\nHardware name: linux,dummy-virt (DT)\nWorkqueue: hci0 hci_cmd_sync_work\nCall trace:\n show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0xb4/0xd4 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0x118/0x5d8 mm/kasan/report.c:482\n kasan_report+0xb0/0xf4 mm/kasan/report.c:595\n __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378\n add_device_complete+0x358/0x3d8 net/bluetooth/mgmt.c:7671\n hci_cmd_sync_work+0x14c/0x240 net/bluetooth/hci_sync.c:334\n process_one_work+0x628/0xd38 kernel/workqueue.c:3289\n process_scheduled_works kernel/workqueue.c:3372 [inline]\n worker_thread+0x7a8/0xac0 kernel/workqueue.c:3453\n kthread+0x39c/0x444 kernel/kthread.c:436\n ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860\n\nAllocated by task 3401:\n kasan_save_stack+0x3c/0x64 mm/kasan/common.c:57\n kasan_save_track+0x20/0x3c mm/kasan/common.c:78\n kasan_save_alloc_info+0x40/0x54 mm/kasan/generic.c:570\n poison_kmalloc_redzone mm/kasan/common.c:398 [inline]\n __kasan_kmalloc+0xd4/0xd8 mm/kasan/common.c:415\n kasan_kmalloc include/linux/kasan.h:263 [inline]\n __kmalloc_cache_noprof+0x1b0/0x458 mm/slub.c:5385\n kmalloc_noprof include/linux/slab.h:950 [inline]\n kzalloc_noprof include/linux/slab.h:1188 [inline]\n hci_conn_params_add+0x10c/0x4b0 net/bluetooth/hci_core.c:2279\n hci_conn_params_set net/bluetooth/mgmt.c:5162 [inline]\n add_device+0x5b4/0xa54 net/bluetooth/mgmt.c:7755\n hci_mgmt_cmd net/bluetooth/hci_sock.c:1721 [inline]\n hci_sock_sendmsg+0x10b4/0x1dd0 net/bluetooth/hci_sock.c:1841\n sock_sendmsg_nosec net/socket.c:727 [inline]\n __sock_sendmsg+0xe0/0x128 net/socket.c:742\n sock_write_iter+0x250/0x390 net/socket.c:1195\n new_sync_write fs/read_write.c:595 [inline]\n vfs_write+0x66c/0xab0 fs/read_write.c:688\n ksys_write+0x1fc/0x24c fs/read_write.c:740\n __do_sys_write fs/read_write.c:751 [inline]\n __se_sys_write fs/read_write.c:748 [inline]\n __arm64_sys_write+0x70/0xa4 fs/read_write.c:748\n __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]\n invoke_syscall+0x84/0x2a8 arch/arm64/kernel/syscall.c:49\n el0_svc_common.constprop.0+0xe4/0x294 arch/arm64/kernel/syscall.c:132\n do_el0_svc+0x44/0x5c arch/arm64/kernel/syscall.c:151\n el0_svc+0x38/0xac arch/arm64/kernel/entry-common.c:724\n el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:743\n el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596\n\nFreed by task 3740:\n kasan_save_stack+0x3c/0x64 \n---truncated---"
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:55:34.241Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
{
"url": "https://git.kernel.org/stable/c/caed4a96d55757c139a899744657c032b6186665"
},
{
"url": "https://git.kernel.org/stable/c/e4369e4e970f3fa4676b76be14c1d315c87f22b6"
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"url": "https://git.kernel.org/stable/c/b346efa825b5e4386f19bc63f81141652d496ec4"
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},
{
"url": "https://git.kernel.org/stable/c/fa85d985f614bc3feb343000f14a1072e99b0df1"
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"title": "Bluetooth: MGMT: Fix UAF of hci_conn_params in add_device_complete",
"x_generator": {
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-64433",
"datePublished": "2026-07-25T08:51:08.432Z",
"dateReserved": "2026-07-19T15:36:31.787Z",
"dateUpdated": "2026-08-17T04:55:34.241Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-64432 (GCVE-0-2026-64432)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
fs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns
Summary
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns
In the analysis pass of $LogFile journal replay, log_replay() copies
LCNs from each action log record into an existing Dirty Page Table
(DPT) entry without bounding the destination index. A crafted NTFS
image with DPT entry lcns_follow=1 and an action log record with
lcns_follow=2 produces a kernel slab out-of-bounds write at mount
time:
BUG: KASAN: slab-out-of-bounds in log_replay+0x654c/0xdb60
Write of size 8 at addr ffff8880095e1040 by task mount
Two attacker-controlled fields can drive j+i past the allocated
page_lcns[] array:
1. dp->lcns_follow (capacity) can be smaller than lrh->lcns_follow.
2. lrh->target_vcn may be smaller than dp->vcn, making the u64
subtraction wrap to a huge size_t.
Validate target VCN delta and per-record LCN count against the
DPT entry capacity, bail via the existing out: cleanup label with
-EINVAL.
This mirrors the bounds-check pattern added in commit b2bc7c44ed17
("fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot")
and commit 0ca0485e4b2e ("fs/ntfs3: validate rec->used in
journal-replay file record check").
Severity
7.8 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
b46acd6a6a627d876898e1c84d3f84902264b445 , < 964c3fae1dfc49dde5468eace940f199cda234e9
(git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 3aa96956ca2200674e2a8f9c23ec6ecd45e5010f (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 946046841013ebac8492ef49651c53638d7a9a6a (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < c6f9e804f73ef809529865fbc7256dd189ff8c33 (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < cf28fc1658463d768657cf1c27a83980d4ba7ef2 (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < f433acc85b86f327d03ba8b03a33c105c51053de (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 57382ec6ac63b63dce2789e835fded28b698ae79 (git) |
|
| Linux | Linux |
Affected:
5.15
Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns\n\nIn the analysis pass of $LogFile journal replay, log_replay() copies\nLCNs from each action log record into an existing Dirty Page Table\n(DPT) entry without bounding the destination index. A crafted NTFS\nimage with DPT entry lcns_follow=1 and an action log record with\nlcns_follow=2 produces a kernel slab out-of-bounds write at mount\ntime:\n\n BUG: KASAN: slab-out-of-bounds in log_replay+0x654c/0xdb60\n Write of size 8 at addr ffff8880095e1040 by task mount\n\nTwo attacker-controlled fields can drive j+i past the allocated\npage_lcns[] array:\n\n 1. dp-\u003elcns_follow (capacity) can be smaller than lrh-\u003elcns_follow.\n 2. lrh-\u003etarget_vcn may be smaller than dp-\u003evcn, making the u64\n subtraction wrap to a huge size_t.\n\nValidate target VCN delta and per-record LCN count against the\nDPT entry capacity, bail via the existing out: cleanup label with\n-EINVAL.\n\nThis mirrors the bounds-check pattern added in commit b2bc7c44ed17\n(\"fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot\")\nand commit 0ca0485e4b2e (\"fs/ntfs3: validate rec-\u003eused in\njournal-replay file record check\")."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable journal-replay code is reached by mounting a crafted local block-device or loop-backed NTFS image, not through network traffic.\nAC:L - Crafted DPT and action records deterministically trigger the out-of-bounds write without a race or conditions beyond attacker control.\nPR:N - Although direct mounting requires initial-namespace CAP_SYS_ADMIN, an unprivileged attacker can provide the crafted volume for a privileged victim to mount and therefore needs no privileges.\nUI:R - A victim must attach, select, or mount the attacker-supplied NTFS volume; replay occurs during that mount even when read-only.\nS:U - The corruption and resulting impacts occur within the host kernel\u0027s existing security authority, without crossing a virtualization or other scope boundary.\nC:H - The attacker controls a sequential kernel slab out-of-bounds write that can corrupt adjacent objects and plausibly enable kernel code execution and arbitrary memory disclosure.\nI:H - The attacker-controlled 64-bit overwrite can corrupt kernel objects, pointers, or control data, making arbitrary modification and control-flow hijacking defensible.\nA:H - The reproduced slab out-of-bounds write can cause an immediate kernel oops or panic, and malformed volumes can trigger it repeatedly when mounted."
}
]
}
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"title": "fs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns",
"x_generator": {
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"cveId": "CVE-2026-64432",
"datePublished": "2026-07-25T08:51:07.791Z",
"dateReserved": "2026-07-19T15:36:31.787Z",
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CVE-2026-64431 (GCVE-0-2026-64431)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
ntfs: avoid calling post_write_mst_fixup() for invalid index_block
Summary
In the Linux kernel, the following vulnerability has been resolved:
ntfs: avoid calling post_write_mst_fixup() for invalid index_block
ntfs_icx_ib_sync_write() calls post_write_mst_fixup() when ntfs_ib_write()
returns an error, intending to restore the buffer after a failed write.
However, ntfs_ib_write() returns an error immediately if
pre_write_mst_fixup() validation fails. The caller,
ntfs_icx_ib_sync_write(), interprets any error as a write failure
requiring rollback. It does not differentiate between I/O errors and
validation failures, and calls post_write_mst_fixup() anyway.
Since post_write_mst_fixup() assumes that the index_block contents is
correct, it doesn't perform the boundary checks, which results in
out-of-bounds memory access.
An attacker can craft a malicious NTFS image with:
- large index_block.usa_ofs offset, pointing outside the ntfs_record
- index_block.usa_count = 0, causing integer underflow
- or index_block.usa_count larger than actual number of sectors in the
ntfs_record, causing out-of-bounds access
KASAN reports describing the memory corruption:
==================================================================
BUG: KASAN: slab-out-of-bounds in post_write_mst_fixup+0x19c/0x1d0
Read of size 2 at addr ffff8881586c9018 by task p/9428
Call Trace:
<TASK>
dump_stack_lvl+0x100/0x190
print_report+0x139/0x4ad
? post_write_mst_fixup+0x19c/0x1d0
? __virt_addr_valid+0x262/0x500
? post_write_mst_fixup+0x19c/0x1d0
kasan_report+0xe4/0x1d0
? post_write_mst_fixup+0x19c/0x1d0
post_write_mst_fixup+0x19c/0x1d0
ntfs_icx_ib_sync_write+0x179/0x220
ntfs_inode_sync_filename+0x83d/0x1080
__ntfs_write_inode+0x1049/0x1480
ntfs_file_fsync+0x131/0x9b0
==================================================================
BUG: KASAN: slab-out-of-bounds in post_write_mst_fixup+0x1aa/0x1d0
Write of size 2 at addr ffff8881586c91fe by task p/9428
Call Trace:
<TASK>
dump_stack_lvl+0x100/0x190
print_report+0x139/0x4ad
? post_write_mst_fixup+0x1aa/0x1d0
? __virt_addr_valid+0x262/0x500
? post_write_mst_fixup+0x1aa/0x1d0
kasan_report+0xe4/0x1d0
? post_write_mst_fixup+0x1aa/0x1d0
post_write_mst_fixup+0x1aa/0x1d0
ntfs_icx_ib_sync_write+0x179/0x220
ntfs_inode_sync_filename+0x83d/0x1080
__ntfs_write_inode+0x1049/0x1480
ntfs_file_fsync+0x131/0x9b0
==================================================================
Let's move the post_write_mst_fixup() call to ntfs_ib_write().
The ntfs_ib_write() function calls pre_write_mst_fixup() at the beginning.
If the index_block contents is invalid, pre_write_mst_fixup() fails and
ntfs_ib_write() returns early without calling post_write_mst_fixup() on
bad index_block.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
0a8ac0c1fa0b99a5b29002bc7f232ed7eafddef0 , < e2018628301a6d9f54e34b0cb417f1688c66df1d
(git)
Affected: 0a8ac0c1fa0b99a5b29002bc7f232ed7eafddef0 , < 5b6eedd7cc2936f9238e852b553a1b326105bde8 (git) |
|
| Linux | Linux |
Affected:
7.1
Unaffected: 0 , < 7.1 (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: avoid calling post_write_mst_fixup() for invalid index_block\n\nntfs_icx_ib_sync_write() calls post_write_mst_fixup() when ntfs_ib_write()\nreturns an error, intending to restore the buffer after a failed write.\n\nHowever, ntfs_ib_write() returns an error immediately if\npre_write_mst_fixup() validation fails. The caller,\nntfs_icx_ib_sync_write(), interprets any error as a write failure\nrequiring rollback. It does not differentiate between I/O errors and\nvalidation failures, and calls post_write_mst_fixup() anyway.\n\nSince post_write_mst_fixup() assumes that the index_block contents is\ncorrect, it doesn\u0027t perform the boundary checks, which results in\nout-of-bounds memory access.\n\nAn attacker can craft a malicious NTFS image with:\n - large index_block.usa_ofs offset, pointing outside the ntfs_record\n - index_block.usa_count = 0, causing integer underflow\n - or index_block.usa_count larger than actual number of sectors in the\n ntfs_record, causing out-of-bounds access\n\nKASAN reports describing the memory corruption:\n ==================================================================\n BUG: KASAN: slab-out-of-bounds in post_write_mst_fixup+0x19c/0x1d0\n Read of size 2 at addr ffff8881586c9018 by task p/9428\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x100/0x190\n print_report+0x139/0x4ad\n ? post_write_mst_fixup+0x19c/0x1d0\n ? __virt_addr_valid+0x262/0x500\n ? post_write_mst_fixup+0x19c/0x1d0\n kasan_report+0xe4/0x1d0\n ? post_write_mst_fixup+0x19c/0x1d0\n post_write_mst_fixup+0x19c/0x1d0\n ntfs_icx_ib_sync_write+0x179/0x220\n ntfs_inode_sync_filename+0x83d/0x1080\n __ntfs_write_inode+0x1049/0x1480\n ntfs_file_fsync+0x131/0x9b0\n ==================================================================\n BUG: KASAN: slab-out-of-bounds in post_write_mst_fixup+0x1aa/0x1d0\n Write of size 2 at addr ffff8881586c91fe by task p/9428\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x100/0x190\n print_report+0x139/0x4ad\n ? post_write_mst_fixup+0x1aa/0x1d0\n ? __virt_addr_valid+0x262/0x500\n ? post_write_mst_fixup+0x1aa/0x1d0\n kasan_report+0xe4/0x1d0\n ? post_write_mst_fixup+0x1aa/0x1d0\n post_write_mst_fixup+0x1aa/0x1d0\n ntfs_icx_ib_sync_write+0x179/0x220\n ntfs_inode_sync_filename+0x83d/0x1080\n __ntfs_write_inode+0x1049/0x1480\n ntfs_file_fsync+0x131/0x9b0\n ==================================================================\n\nLet\u0027s move the post_write_mst_fixup() call to ntfs_ib_write().\nThe ntfs_ib_write() function calls pre_write_mst_fixup() at the beginning.\nIf the index_block contents is invalid, pre_write_mst_fixup() fails and\nntfs_ib_write() returns early without calling post_write_mst_fixup() on\nbad index_block."
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"value": "AV:L - The malformed USA fields originate in a crafted NTFS volume, and exploitation proceeds through local file modification followed by fsync or writeback. Network file access alone cannot create the required malformed index metadata.\nAC:L - The attacker controls the index block, USA offset/count, target filename, and triggering operation; no race or condition outside attacker control is required. The usa_count underflow provides a deterministic corruption path.\nPR:L - Although a direct NTFS mount requires initial-namespace CAP_SYS_ADMIN because NTFS lacks FS_USERNS_MOUNT, delegated or automatic mounting allows an ordinary local user to reach the trigger. After mounting, only write access to the crafted file is needed and no capability check occurs.\nUI:N - In reasonable automount, delegated-mount, or fstab-user deployments, no separate victim action is required. The attacker can mount or access the volume, modify the writable file, and invoke fsync independently.\nS:U - The corruption occurs in the host kernel and compromises resources governed by that same kernel security authority. This is standard local kernel privilege escalation rather than a guest-to-host or IOMMU boundary escape.\nC:H - Unchecked USA metadata causes substantial out-of-bounds reads, and the accompanying kernel heap corruption can be leveraged to disclose arbitrary kernel memory. The reads are not confined to a small bounded value.\nI:H - An underflowed usa_count produces up to 65,535 two-byte writes at 512-byte intervals, spanning roughly 32 MiB beyond the index-block allocation. Attacker-controlled initial source values and heap grooming make control-flow hijacking or arbitrary kernel modification defensible.\nA:H - The extensive out-of-bounds access can corrupt unrelated kernel objects or access invalid memory, causing an oops, panic, or system-wide failure. The trigger is repeatable through local filesystem operations."
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CVE-2026-64430 (GCVE-0-2026-64430)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
NTB: epf: Avoid calling pci_irq_vector() from hardirq context
Summary
In the Linux kernel, the following vulnerability has been resolved:
NTB: epf: Avoid calling pci_irq_vector() from hardirq context
ntb_epf_vec_isr() calls pci_irq_vector() in hardirq context to derive
the vector number. pci_irq_vector() calls msi_get_virq() that takes a
mutex and can therefore trigger "scheduling while atomic" splats:
BUG: scheduling while atomic: kworker/u33:0/55/0x00010001
...
Call trace:
...
schedule+0x38/0x110
schedule_preempt_disabled+0x28/0x50
__mutex_lock.constprop.0+0x848/0x908
__mutex_lock_slowpath+0x18/0x30
mutex_lock+0x4c/0x60
msi_domain_get_virq+0xe8/0x138
pci_irq_vector+0x2c/0x60
ntb_epf_vec_isr+0x28/0x120 [ntb_hw_epf]
__handle_irq_event_percpu+0x70/0x3a8
handle_irq_event+0x48/0x100
handle_edge_irq+0x100/0x1c8
...
Cache the Linux IRQ number for vector 0 when vectors are allocated and
use it as a base in the ISR. Running the ISR in a threaded IRQ handler
would also avoid the problem, but that would be unnecessary here.
Severity
7.5 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
812ce2f8d14ea791edd88c36ebcc9017bf4c88cb , < 33bba331a4a5fee8b6026fe72eca13cceeec1b7b
(git)
Affected: 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb , < aff271b12a1eb8c8b3da19223ae1a6abe1e8168b (git) Affected: 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb , < 1dba8444ac0100133d72374634f6d7451fff1ccc (git) Affected: 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb , < 174a97f21bf9c54fa37ec0f321692e862ea130a3 (git) Affected: 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb , < f71e8d9875069fa73e335f63f02ec6e52e3aaa51 (git) Affected: 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb , < 6350df503897d57c5634f71b0767d48c3b837583 (git) Affected: 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb , < 4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f (git) |
|
| Linux | Linux |
Affected:
5.12
Unaffected: 0 , < 5.12 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNTB: epf: Avoid calling pci_irq_vector() from hardirq context\n\nntb_epf_vec_isr() calls pci_irq_vector() in hardirq context to derive\nthe vector number. pci_irq_vector() calls msi_get_virq() that takes a\nmutex and can therefore trigger \"scheduling while atomic\" splats:\n\n BUG: scheduling while atomic: kworker/u33:0/55/0x00010001\n ...\n Call trace:\n ...\n schedule+0x38/0x110\n schedule_preempt_disabled+0x28/0x50\n __mutex_lock.constprop.0+0x848/0x908\n __mutex_lock_slowpath+0x18/0x30\n mutex_lock+0x4c/0x60\n msi_domain_get_virq+0xe8/0x138\n pci_irq_vector+0x2c/0x60\n ntb_epf_vec_isr+0x28/0x120 [ntb_hw_epf]\n __handle_irq_event_percpu+0x70/0x3a8\n handle_irq_event+0x48/0x100\n handle_edge_irq+0x100/0x1c8\n ...\n\nCache the Linux IRQ number for vector 0 when vectors are allocated and\nuse it as a base in the ISR. Running the ISR in a threaded IRQ handler\nwould also avoid the problem, but that would be unnecessary here."
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CVE-2026-64429 (GCVE-0-2026-64429)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
gpio: eic-sprd: use raw_spinlock_t in the irq startup path
Summary
In the Linux kernel, the following vulnerability has been resolved:
gpio: eic-sprd: use raw_spinlock_t in the irq startup path
sprd_eic_irq_unmask() enables the GPIO IRQ and then updates controller
state through sprd_eic_update(), which takes sprd_eic->lock with
spin_lock_irqsave(). The callback can be reached from irq_startup()
while setting up a requested IRQ. That path is not sleepable, but on
PREEMPT_RT a regular spinlock_t becomes a sleeping lock.
This issue was found by our static analysis tool and then manually
reviewed against the current tree.
The grounded PoC kept the request_threaded_irq() -> __setup_irq() ->
irq_startup() -> sprd_eic_irq_unmask() -> sprd_eic_update() carrier and
used the original spin_lock_irqsave(&sprd_eic->lock) edge. Lockdep
BUG: sleeping function called from invalid context
hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]
sprd_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]
sprd_eic_update.constprop.0+0x48/0x90 [vuln_msv]
sprd_eic_irq_unmask.constprop.0+0x35/0x50 [vuln_msv]
__setup_irq.constprop.0+0xd/0x30 [vuln_msv]
Convert the Spreadtrum EIC controller lock to raw_spinlock_t. The
locked section only serializes MMIO register updates and does not contain
sleepable operations, so keeping it non-sleeping is appropriate for the
irqchip callbacks.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
25518e024e3a6e5715d672f1daa91e1d100f7436 , < 96612bf2712cd961dbd9b52f3a9b4ab668f57628
(git)
Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 581ac2ad001ff1128931191f249a7f2074672b7a (git) Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < e244cd8b51001ba480f274c44dba9002813a4739 (git) Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 19d63fd528719ce7d06d9aeb88d25b7d6478198a (git) Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 6112fba4150039ccd90e29f2d1b788c73ad7b3dd (git) Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 4750909a40da9016185e0ac991510a278cecb1e7 (git) Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e (git) Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 90f0109019e6817eb40a486671b7722d1544ae29 (git) |
|
| Linux | Linux |
Affected:
4.17
Unaffected: 0 , < 4.17 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64428 (GCVE-0-2026-64428)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
gpio: sch: use raw_spinlock_t in the irq startup path
Summary
In the Linux kernel, the following vulnerability has been resolved:
gpio: sch: use raw_spinlock_t in the irq startup path
sch_irq_unmask() enables the GPIO IRQ and then updates the controller
state through sch_irq_mask_unmask(), which takes sch->lock with
spin_lock_irqsave(). The callback can be reached from irq_startup()
while setting up a requested IRQ. That path is not sleepable, but on
PREEMPT_RT a regular spinlock_t becomes a sleeping lock.
This issue was found by our static analysis tool and then manually
reviewed against the current tree.
The grounded PoC kept the request_threaded_irq() -> __setup_irq() ->
irq_startup() -> sch_irq_unmask() -> sch_irq_mask_unmask() carrier and
used the original spin_lock_irqsave(&sch->lock) edge. Lockdep reported:
BUG: sleeping function called from invalid context
hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]
sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]
sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv]
__setup_irq.constprop.0+0xd/0x30 [vuln_msv]
Convert the SCH controller lock to raw_spinlock_t. The same lock is
also used by the GPIO direction and value callbacks, but those critical
sections only update MMIO-backed GPIO registers and do not contain
sleepable operations. Keeping this register lock non-sleeping is
therefore appropriate for the irqchip callbacks and does not change the
GPIO-side locking contract.
Severity
No CVSS data available.
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d
(git)
Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 4f03a15cc73c83740fc355ee22b336492d17b4da (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 7a550256d68bbdfa0903ab1c4595c04a6815493a (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < a235cec779bb39ec8f961a935b28a2ce278c6c64 (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 4508366ab7dd0c2917a51a9c2e23cc1b9d35157a (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 41cad91a09d69e8fff4e936db29b1054b4e9f9f7 (git) Affected: 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 , < 286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b (git) |
|
| Linux | Linux |
Affected:
5.13
Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: sch: use raw_spinlock_t in the irq startup path\n\nsch_irq_unmask() enables the GPIO IRQ and then updates the controller\nstate through sch_irq_mask_unmask(), which takes sch-\u003elock with\nspin_lock_irqsave(). The callback can be reached from irq_startup()\nwhile setting up a requested IRQ. That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -\u003e __setup_irq() -\u003e\nirq_startup() -\u003e sch_irq_unmask() -\u003e sch_irq_mask_unmask() carrier and\nused the original spin_lock_irqsave(\u0026sch-\u003elock) edge. Lockdep reported:\n\n BUG: sleeping function called from invalid context\n hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv]\n __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the SCH controller lock to raw_spinlock_t. The same lock is\nalso used by the GPIO direction and value callbacks, but those critical\nsections only update MMIO-backed GPIO registers and do not contain\nsleepable operations. Keeping this register lock non-sleeping is\ntherefore appropriate for the irqchip callbacks and does not change the\nGPIO-side locking contract."
}
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CVE-2026-64427 (GCVE-0-2026-64427)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-19 16:28
VLAI
EPSS
VEX
Title
HID: logitech-dj: Fix maxfield check in DJ short report validation
Summary
In the Linux kernel, the following vulnerability has been resolved:
HID: logitech-dj: Fix maxfield check in DJ short report validation
Commit b6a57912854e ("HID: logitech-dj: Prevent REPORT_ID_DJ_SHORT
related user initiated OOB write") added validation for the DJ short
output report, but the error path dereferences rep->field[0] even when
rep->maxfield is zero.
Commit 8b9a097eb2fc ("HID: logitech-dj: fix wrong detection of bad
DJ_SHORT output report") made the check conditional on rep being present,
but a crafted descriptor can still create report ID 0x20 with only padding
output items. hid-core registers the report, ignores the padding field,
and leaves rep->maxfield as zero.
In that case the validation enters the rep->maxfield < 1 branch and then
dereferences rep->field[0]->report_count while printing the error message,
causing a NULL pointer dereference during probe. This is reproducible with
uhid by emulating a Logitech receiver with a padding-only DJ short output
report:
BUG: KASAN: null-ptr-deref in logi_dj_probe+0xb1/0x754 [hid_logitech_dj]
Read of size 4 at addr 0000000000000028 by task kworker/4:1/129
...
Call Trace:
logi_dj_probe+0xb1/0x754 [hid_logitech_dj]
hid_device_probe+0x329/0x3f0 [hid]
really_probe+0x162/0x570
__device_attach+0x137/0x2c0
bus_probe_device+0x38/0xc0
device_add+0xa56/0xce0
hid_add_device+0x19c/0x280 [hid]
uhid_device_add_worker+0x2c/0xb0 [uhid]
Reject the zero-field report before printing the field report_count.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
7754ade02d0fb1caf20392baf4e02937378fd136 , < f3790a6af9c7f47d454225cab9dc145270e48f62
(git)
Affected: 2ed9638cfbf9d49bdef9b0f5ee547236c2c2f500 , < 1215febd644c3e16f77e0f1799d89544dd57a754 (git) Affected: eeb5ad388595ca2b6624689198a057847f3a3e19 , < 6f7f22a8d244c2e586b8eb61c7585784b62aea01 (git) Affected: 968e84f5c0dca4960580d174500e4bbf0c45dc15 , < 95b3f23d632490b5eb285b9fcf7284f2ac8f9872 (git) Affected: ce2a731c179df8869e1969a1b2b5b9e4e1c25f8b , < 80c1e18473f63fd7c6a2bc9ad6f3d0a6cc4fb500 (git) Affected: bc3bba4656ad280267ea78cf845ab6b1d95b9fcd , < 2b70bebc709489d29a31ac2935aeffb8d5228395 (git) Affected: b6a57912854e7ea36f3b270032661140cc4209cd , < 7a89ad762fad53d56b7002d7ffc923a4b7f4006f (git) Affected: b6a57912854e7ea36f3b270032661140cc4209cd , < 590cc4d782487632a52f37c2171bee1eeea29627 (git) |
|
| Linux | Linux |
Affected:
7.1
Unaffected: 0 , < 7.1 (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: logitech-dj: Fix maxfield check in DJ short report validation\n\nCommit b6a57912854e (\"HID: logitech-dj: Prevent REPORT_ID_DJ_SHORT\nrelated user initiated OOB write\") added validation for the DJ short\noutput report, but the error path dereferences rep-\u003efield[0] even when\nrep-\u003emaxfield is zero.\n\nCommit 8b9a097eb2fc (\"HID: logitech-dj: fix wrong detection of bad\nDJ_SHORT output report\") made the check conditional on rep being present,\nbut a crafted descriptor can still create report ID 0x20 with only padding\noutput items. hid-core registers the report, ignores the padding field,\nand leaves rep-\u003emaxfield as zero.\n\nIn that case the validation enters the rep-\u003emaxfield \u003c 1 branch and then\ndereferences rep-\u003efield[0]-\u003ereport_count while printing the error message,\ncausing a NULL pointer dereference during probe. This is reproducible with\nuhid by emulating a Logitech receiver with a padding-only DJ short output\nreport:\n\n BUG: KASAN: null-ptr-deref in logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n Read of size 4 at addr 0000000000000028 by task kworker/4:1/129\n ...\n Call Trace:\n logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n hid_device_probe+0x329/0x3f0 [hid]\n really_probe+0x162/0x570\n __device_attach+0x137/0x2c0\n bus_probe_device+0x38/0xc0\n device_add+0xa56/0xce0\n hid_add_device+0x19c/0x280 [hid]\n uhid_device_add_worker+0x2c/0xb0 [uhid]\n\nReject the zero-field report before printing the field report_count."
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CVE-2026-64426 (GCVE-0-2026-64426)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
io_uring/nop: fix file reference leak with IOSQE_FIXED_FILE
Summary
In the Linux kernel, the following vulnerability has been resolved:
io_uring/nop: fix file reference leak with IOSQE_FIXED_FILE
NOP file-acquisition support choses between a fixed (registered) file and
a normal fget()'d file based on its own IORING_NOP_FIXED_FILE flag in
sqe->nop_flags. However, a request's REQ_F_FIXED_FILE is set
independently from the generic IOSQE_FIXED_FILE sqe flag during request
init, before the issue handler runs.
If a NOP is submitted with IOSQE_FIXED_FILE set (so REQ_F_FIXED_FILE is
set) but without IORING_NOP_FIXED_FILE, io_nop() takes the normal path
and grabs a real reference via io_file_get_normal(). On completion,
io_put_file() only drops the reference when REQ_F_FIXED_FILE is clear,
so the fget()'d file is never released and leaks:
BUG: memory leak
unreferenced object 0xffff88800f42c240 (size 176):
kmem_cache_alloc_noprof+0x358/0x440
alloc_empty_file+0x57/0x180
path_openat+0x44/0x1e50
do_file_open+0x121/0x200
do_sys_openat2+0xa7/0x150
__x64_sys_openat+0x82/0xf0
Decide between fixed and normal file acquisition from REQ_F_FIXED_FILE,
the same way io_assign_file() does for every other opcode, and fold
IORING_NOP_FIXED_FILE into REQ_F_FIXED_FILE at prep time.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
a85f31052bce52111b4e9d5a536003481d0421d0 , < 722869fcff598fad20d5ab79c305897a7534708b
(git)
Affected: a85f31052bce52111b4e9d5a536003481d0421d0 , < 7267717f35787167fcce4bc14f6ef3fa06682dcf (git) Affected: a85f31052bce52111b4e9d5a536003481d0421d0 , < 2564ca2e31bd8ee8348362941af2ee4671e487ca (git) |
|
| Linux | Linux |
Affected:
6.13
Unaffected: 0 , < 6.13 (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64425 (GCVE-0-2026-64425)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-09-08 08:50
VLAI
EPSS
VEX
Title
io_uring/io-wq: re-check IO_WQ_BIT_EXIT for each linked work item
Summary
In the Linux kernel, the following vulnerability has been resolved:
io_uring/io-wq: re-check IO_WQ_BIT_EXIT for each linked work item
commit 10dc95939817 ("io_uring/io-wq: check IO_WQ_BIT_EXIT inside work
run loop") fixed the obvious case where io_worker_handle_work() took one
exit-bit snapshot before draining pending work, but the fix stops one
level too early.
io_worker_handle_work() now re-checks IO_WQ_BIT_EXIT in its outer work
run loop, yet it still snapshots that bit once before processing a whole
dependent linked-work chain. If io_wq_exit_start() sets IO_WQ_BIT_EXIT
after the first linked item has started, the remaining linked items can
still reuse stale do_kill = false, skip IO_WQ_WORK_CANCEL, and continue
running after exit has begun.
Move the check further inside, so it covers linked items too. Note: this
is a syzbot special as it loves setting up tons of slow linked work on
weird devices like msr that take forever to read, and immediately close
the ring. Exit then takes a long time.
Severity
No CVSS data available.
Assigner
References
9 references
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
065dd936195a3466b8ebe5f9287400987ee3c063 , < 14b7ecad2ec56699325180a744f4b19f046401bb
(git)
Affected: 27e47500fac23d15b7dc93ff650bc4844d2581bd , < d179533c610e1b4c6aa436e3c1fd1b719d2c727c (git) Affected: d05d99573f81a091547b1778b9a50120f5d6c68a , < 6e2f51f3e06773c2ee98ad09738f0908b48f76f9 (git) Affected: 85eb83694a91c89d9abe615d717c0053c3efa714 , < ea61b04e1d7242cb37f5ed2cc91cf21a493f6597 (git) Affected: 2e8ca1078b14142db2ce51cbd18ff9971560046b , < b6f179a653a934736c88d820fe0098c3c2532549 (git) Affected: bdf0bf73006ea8af9327cdb85cfdff4c23a5f966 , < 1636d85dc139b07c0449308f2bb5e0c7a2e0da99 (git) Affected: 10dc959398175736e495f71c771f8641e1ca1907 , < ab85765cbe3258b43dc6729af0e6ce3a87a133d8 (git) Affected: 10dc959398175736e495f71c771f8641e1ca1907 , < 29bef9934b2521f787bb15dd1985d4c0d12ae02a (git) Affected: 5.10.253 , < 5.10.261 (semver) Affected: 5.15.203 , < 5.15.212 (semver) Affected: 6.1.167 , < 6.1.178 (semver) Affected: 6.6.122 , < 6.6.145 (semver) Affected: 6.12.68 , < 6.12.96 (semver) Affected: 6.18.8 , < 6.18.39 (semver) |
|
| Linux | Linux |
Affected:
6.19
Unaffected: 0 , < 6.19 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
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CVE-2026-64424 (GCVE-0-2026-64424)
Vulnerability from nvd – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
netpoll: fix a use-after-free on shutdown path
Summary
In the Linux kernel, the following vulnerability has been resolved:
netpoll: fix a use-after-free on shutdown path
There is a use-after-free error on netpoll, which is clearly detected by
KASAN.
BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x3b/0x80
Read of size 1 at addr ... by task kworker/9:1
Workqueue: events queue_process
Call Trace:
skb_dequeue+0x1e/0xb0
queue_process+0x2c/0x600
process_scheduled_works+0x4b6/0x850
worker_thread+0x414/0x5a0
Allocated by task 242:
__netpoll_setup+0x201/0x4a0
netpoll_setup+0x249/0x550
enabled_store+0x32f/0x380
Freed by task 0:
kfree+0x1b7/0x540
rcu_core+0x3f8/0x7a0
The problem happens when there is a pending TX worker running in
parallel with the cleanup path.
This is what happens on netpoll shutdown path:
1) __netpoll_cleanup() is called
2) set dev->npinfo to NULL
3) call_rcu() with rcu_cleanup_netpoll_info()
3.1) rcu_cleanup_netpoll_info() tries to cancel all workers with
cancel_delayed_work(), but doesn't wait for the worker to finish
4) and kfree(npinfo);
Because 3.1) doesn't really cancel the work, as the comment says "we
can't call cancel_delayed_work_sync here, as we are in softirq", the TX
worker can run after 4).
Tl;DR: queue_process() is not an RCU reader, it reaches npinfo through
the work item via container_of().
Use disable_delayed_work_sync() to ensure the worker is completely
stopped and prevent any future re-arming attempts. Once npinfo is set
to NULL, senders will bail out and not queue new work. The disable flag
ensures any in-flight re-arming attempts also fail silently.
In the future, we can do the cleanup inline here without needing the
npinfo->rcu rcu_head, but that is net-next material.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
38e6bc185d9544dfad1774b3f8902a0b061aea25 , < 95ecc5b58042f6b6743b589e6588f1cd7ba336aa
(git)
Affected: 38e6bc185d9544dfad1774b3f8902a0b061aea25 , < a33f37f8d079da7236ed7b7e2aed2a34ab81e7cf (git) Affected: 38e6bc185d9544dfad1774b3f8902a0b061aea25 , < 5ed09a108d93a3b002cc79823d9455b50c4a8be7 (git) Affected: 38e6bc185d9544dfad1774b3f8902a0b061aea25 , < 45f1458a85017a023f138b22ac5c76abd477db42 (git) |
|
| Linux | Linux |
Affected:
3.6
Unaffected: 0 , < 3.6 (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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