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29228 vulnerabilities found for linux_kernel by linux
CVE-2026-63807 (GCVE-0-2026-63807)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level
When recovering hugepages in the shadow MMU, verify that the base gfn of
the shadow page is actually contained within the target memslot, *before*
querying the max mapping level given the shadow page's gfn. Failure to
pre-check the validity of the gfn can lead to an out-of-bounds access to
the slot's lpage_info (which typically manifests as a host #PF because the
lpage_info is vmalloc'd) if the guest creates a hugepage mapping (in its
PTEs) that extends "below" the bounds of a memslot.
When faulting in memory for a guest, and the size of the guest mapping is
greater than KVM's (current) max mapping, then KVM will create a "direct"
shadow page (direct in that there are no gPTEs to shadow, and so the target
gfn is a direct calculation given the base gfn of the shadow page). The
hugepage recovery flow looks for such direct shadow pages, as forcing 4KiB
mappings when dirty logging generates the guest > host mapping size case.
When the 4KiB restriction is lifted, then KVM can replace the shadow page
with a hugepage.
But if KVM originally used a smaller mapping than the guest because the
range of memory covered by the guest hugepage exceeds the bounds of a
memslot, then KVM will link a direct shadow page with a gfn that is outside
the bounds of the memslot being used to fault in memory. The rmap entry
added for the leaf mapping is correct and within bounds, but the gfn of the
leaf SPTE's parent shadow page will be out of bounds.
BUG: unable to handle page fault for address: ffffc90000806ffc
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 100000067 P4D 100000067 PUD 1002a7067 PMD 10612f067 PTE 0
Oops: Oops: 0000 [#1] SMP
CPU: 13 UID: 1000 PID: 757 Comm: mmu_stress_test Not tainted 7.1.0-rc1-48ce1e26eace-x86_pir_to_irr_comments-vm #341 PREEMPT
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:kvm_mmu_max_mapping_level+0x79/0x2b0 [kvm]
Call Trace:
<TASK>
kvm_mmu_recover_huge_pages+0x21b/0x320 [kvm]
kvm_set_memslot+0x1ee/0x590 [kvm]
kvm_set_memory_region.part.0+0x3a1/0x4d0 [kvm]
kvm_vm_ioctl+0x9bf/0x15d0 [kvm]
__x64_sys_ioctl+0x8a/0xd0
do_syscall_64+0xb7/0xbb0
entry_SYSCALL_64_after_hwframe+0x4b/0x53
RIP: 0033:0x7f21c0f1a9bf
</TASK>
Don't bother pre-checking the bounds of the potential hugepage, i.e. don't
check that e.g. sp->gfn + KVM_PAGES_PER_HPAGE(sp->role.level + 1) is also
within the memslot, as the checks performed by kvm_mmu_max_mapping_level()
are a superset of the basic bounds checks. I.e. pre-checking the full
range would be a dubious micro-optimization.
Severity
8.8 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
9eba50f8d7fcb61774f160890f98239fa3ab68a6 , < 7b52008023b7facf40fba3ebe92449bda8ea53b9
(git)
Affected: 9eba50f8d7fcb61774f160890f98239fa3ab68a6 , < 5cab1c989f938f5e1b9a0de66486f1fc2c28479b (git) Affected: 9eba50f8d7fcb61774f160890f98239fa3ab68a6 , < 48b91ed7e22bb82571c34f8b80b6ecdc90a6fab8 (git) Affected: 9eba50f8d7fcb61774f160890f98239fa3ab68a6 , < c5c29b3c268332afe67d598a034c58344540ed92 (git) Affected: 9eba50f8d7fcb61774f160890f98239fa3ab68a6 , < 18587f9831612e24cd8f24be1ec15478feff7abc (git) Affected: 9eba50f8d7fcb61774f160890f98239fa3ab68a6 , < b2ae3245ea44dccaa9af676b6747476951883318 (git) Affected: 9eba50f8d7fcb61774f160890f98239fa3ab68a6 , < ef057cbf825e03b63f6edf5980f96abf3c53089d (git) |
|
| Linux | Linux |
Affected:
5.12
Unaffected: 0 , < 5.12 (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
{
"containers": {
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{
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"programFiles": [
"arch/x86/kvm/mmu/mmu.c",
"include/linux/kvm_host.h"
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"versionType": "git"
}
]
},
{
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"arch/x86/kvm/mmu/mmu.c",
"include/linux/kvm_host.h"
],
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{
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"version": "5.12"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.211",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.177",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.144",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.95",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.38",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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"vulnerable": true
},
{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level\n\nWhen recovering hugepages in the shadow MMU, verify that the base gfn of\nthe shadow page is actually contained within the target memslot, *before*\nquerying the max mapping level given the shadow page\u0027s gfn. Failure to\npre-check the validity of the gfn can lead to an out-of-bounds access to\nthe slot\u0027s lpage_info (which typically manifests as a host #PF because the\nlpage_info is vmalloc\u0027d) if the guest creates a hugepage mapping (in its\nPTEs) that extends \"below\" the bounds of a memslot.\n\nWhen faulting in memory for a guest, and the size of the guest mapping is\ngreater than KVM\u0027s (current) max mapping, then KVM will create a \"direct\"\nshadow page (direct in that there are no gPTEs to shadow, and so the target\ngfn is a direct calculation given the base gfn of the shadow page). The\nhugepage recovery flow looks for such direct shadow pages, as forcing 4KiB\nmappings when dirty logging generates the guest \u003e host mapping size case.\nWhen the 4KiB restriction is lifted, then KVM can replace the shadow page\nwith a hugepage.\n\nBut if KVM originally used a smaller mapping than the guest because the\nrange of memory covered by the guest hugepage exceeds the bounds of a\nmemslot, then KVM will link a direct shadow page with a gfn that is outside\nthe bounds of the memslot being used to fault in memory. The rmap entry\nadded for the leaf mapping is correct and within bounds, but the gfn of the\nleaf SPTE\u0027s parent shadow page will be out of bounds.\n\n BUG: unable to handle page fault for address: ffffc90000806ffc\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 100000067 P4D 100000067 PUD 1002a7067 PMD 10612f067 PTE 0\n Oops: Oops: 0000 [#1] SMP\n CPU: 13 UID: 1000 PID: 757 Comm: mmu_stress_test Not tainted 7.1.0-rc1-48ce1e26eace-x86_pir_to_irr_comments-vm #341 PREEMPT\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:kvm_mmu_max_mapping_level+0x79/0x2b0 [kvm]\n Call Trace:\n \u003cTASK\u003e\n kvm_mmu_recover_huge_pages+0x21b/0x320 [kvm]\n kvm_set_memslot+0x1ee/0x590 [kvm]\n kvm_set_memory_region.part.0+0x3a1/0x4d0 [kvm]\n kvm_vm_ioctl+0x9bf/0x15d0 [kvm]\n __x64_sys_ioctl+0x8a/0xd0\n do_syscall_64+0xb7/0xbb0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n RIP: 0033:0x7f21c0f1a9bf\n \u003c/TASK\u003e\n\nDon\u0027t bother pre-checking the bounds of the potential hugepage, i.e. don\u0027t\ncheck that e.g. sp-\u003egfn + KVM_PAGES_PER_HPAGE(sp-\u003erole.level + 1) is also\nwithin the memslot, as the checks performed by kvm_mmu_max_mapping_level()\nare a superset of the basic bounds checks. I.e. pre-checking the full\nrange would be a dubious micro-optimization."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-20T13:40:16.637Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/7b52008023b7facf40fba3ebe92449bda8ea53b9"
},
{
"url": "https://git.kernel.org/stable/c/5cab1c989f938f5e1b9a0de66486f1fc2c28479b"
},
{
"url": "https://git.kernel.org/stable/c/48b91ed7e22bb82571c34f8b80b6ecdc90a6fab8"
},
{
"url": "https://git.kernel.org/stable/c/c5c29b3c268332afe67d598a034c58344540ed92"
},
{
"url": "https://git.kernel.org/stable/c/18587f9831612e24cd8f24be1ec15478feff7abc"
},
{
"url": "https://git.kernel.org/stable/c/b2ae3245ea44dccaa9af676b6747476951883318"
},
{
"url": "https://git.kernel.org/stable/c/ef057cbf825e03b63f6edf5980f96abf3c53089d"
}
],
"title": "KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-63807",
"datePublished": "2026-07-19T12:02:10.759Z",
"dateReserved": "2026-07-19T07:54:57.013Z",
"dateUpdated": "2026-07-20T13:40:16.637Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-63806 (GCVE-0-2026-63806)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-24 14:34
VLAI
EPSS
VEX
Title
KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned()
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned()
Drop a BUG_ON() that has been reachable since it was first added, way back
in 2009, and instead use get_unaligned() to perform potentially-unaligned
accesses.
For a given store, KVM x86's emulator tracks the entire value in the
destination operand, x86_emulate_ctxt.dst. If the destination is memory,
and the target splits multiple pages and/or is emulated MMIO, then KVM
handles each fragment independently. E.g. on a page split starting at page
offset 0xffc, KVM writes 4 bytes to the first page, then the remaining
bytes to the second page, using ctxt->dst as the source for both (with
appropriate offsets).
If the destination splits a page *and* hits emulated MMIO on the second
page, then KVM will complete the write to the first page, then emulate the
MMIO access to the second page. If there is a datamatch-enabled ioeventfd
at offset 0 of the second page, then KVM will process the remainder of the
store as a potential ioeventfd signal.
Putting it all together, if the guest emits a store that splits a page
starting at page offset N, and the second page has a datamatch-enabled
ioeventfd at offset 0, then KVM will check for datamatch using
&dst.valptr[N] as the source. Due to dst (and thus dst.valptr) being
32-byte aligned, if N is not aligned to @len, the BUG_ON() fires.
E.g. with a 16-byte store at page offset 0xffc, to an ioeventfd of len 8,
all initial checks in ioeventfd_in_range() will succeed, and the BUG_ON()
fires due to @val being 4-byte aligned, but not 8-byte aligned.
------------[ cut here ]------------
kernel BUG at arch/x86/kvm/../../../virt/kvm/eventfd.c:783!
Oops: invalid opcode: 0000 [#1] SMP
CPU: 0 UID: 1000 PID: 615 Comm: repro Not tainted 7.1.0-rc2-ff238429d1ea #365 PREEMPT
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:ioeventfd_write+0x6c/0x70 [kvm]
Call Trace:
<TASK>
__kvm_io_bus_write+0x85/0xb0 [kvm]
kvm_io_bus_write+0x53/0x80 [kvm]
vcpu_mmio_write+0x66/0xf0 [kvm]
emulator_read_write_onepage+0x12a/0x540 [kvm]
emulator_read_write+0x109/0x2b0 [kvm]
x86_emulate_insn+0x4f8/0xfb0 [kvm]
x86_emulate_instruction+0x181/0x790 [kvm]
kvm_mmu_page_fault+0x313/0x630 [kvm]
vmx_handle_exit+0x18a/0x590 [kvm_intel]
kvm_arch_vcpu_ioctl_run+0xc81/0x1c90 [kvm]
kvm_vcpu_ioctl+0x2d5/0x970 [kvm]
__x64_sys_ioctl+0x8a/0xd0
do_syscall_64+0xb7/0x890
entry_SYSCALL_64_after_hwframe+0x4b/0x53
RIP: 0033:0x7f19c931a9bf
</TASK>
Modules linked in: kvm_intel kvm irqbypass
---[ end trace 0000000000000000 ]---
In a perfect world, the fix would be to simply delete the BUG_ON(), as KVM
x86 doesn't perform alignment checks on "normal" memory accesses at CPL0.
Sadly, C99 ruins all the fun; while the x86 architecture plays nice,
dereferencing an unaligned pointer directly is undefined behavior in C,
e.g. triggers splats when running with CONFIG_UBSAN_ALIGNMENT=y.
Severity
7.1 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
d34e6b175e61821026893ec5298cc8e7558df43a , < 2426c15c1395b7d5ccf1e5025ca898af7f3decb6
(git)
Affected: d34e6b175e61821026893ec5298cc8e7558df43a , < 4186c850789906b875a1d263377a4d37c078e317 (git) Affected: d34e6b175e61821026893ec5298cc8e7558df43a , < 36ff44fb3d89960391e013fb9d91e23dbc48be47 (git) Affected: d34e6b175e61821026893ec5298cc8e7558df43a , < 92fc631b69deb1c7d56aec2663003600799dcd75 (git) Affected: d34e6b175e61821026893ec5298cc8e7558df43a , < bf89e3738480d33cd515b4a18900e8443d40cd2e (git) Affected: d34e6b175e61821026893ec5298cc8e7558df43a , < 5da9b1a87ec7cc3489c27016313524769f12d9e0 (git) Affected: d34e6b175e61821026893ec5298cc8e7558df43a , < 5c87b47374682f69686068ad0a7779365a527b1c (git) Affected: d34e6b175e61821026893ec5298cc8e7558df43a , < f1edbed787ba67988ed34e0132ca128b052b6ce8 (git) |
|
| Linux | Linux |
Affected:
2.6.32
Unaffected: 0 , < 2.6.32 (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: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
{
"containers": {
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{
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"product": "Linux",
"programFiles": [
"virt/kvm/eventfd.c"
],
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},
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},
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},
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"version": "d34e6b175e61821026893ec5298cc8e7558df43a",
"versionType": "git"
},
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"status": "affected",
"version": "d34e6b175e61821026893ec5298cc8e7558df43a",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"virt/kvm/eventfd.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.32"
},
{
"lessThan": "2.6.32",
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CVE-2026-63805 (GCVE-0-2026-63805)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
crypto: nx - fix nx_crypto_ctx_exit argument
Summary
In the Linux kernel, the following vulnerability has been resolved:
crypto: nx - fix nx_crypto_ctx_exit argument
nx_crypto_ctx_shash_exit calls nx_crypto_ctx_exit with crypto_shash_ctx(...)
but crypto_shash_ctx gives a nx_crypto_ctx *, not a crypto_tfm *.
Fix the type in nx_crypto_ctx_exit and drop the bogus crypto_tfm_ctx
call.
This fixes the following oops:
BUG: Unable to handle kernel data access at 0xc0403effffffffc8
Faulting instruction address: 0xc000000000396cb4
Oops: Kernel access of bad area, sig: 11 [#15]
Call Trace:
nx_crypto_ctx_shash_exit+0x24/0x60
crypto_shash_exit_tfm+0x28/0x40
crypto_destroy_tfm+0x98/0x140
crypto_exit_ahash_using_shash+0x20/0x40
crypto_destroy_tfm+0x98/0x140
hash_release+0x1c/0x30
alg_sock_destruct+0x38/0x60
__sk_destruct+0x48/0x2b0
af_alg_release+0x58/0xb0
__sock_release+0x68/0x150
sock_close+0x20/0x40
__fput+0x110/0x3a0
sys_close+0x48/0xa0
system_call_exception+0x140/0x2d0
system_call_common+0xf4/0x258
.. which came from hardlink(1) opportunistically using AF_ALG.
The same problem exists with nx_crypto_ctx_skcipher_exit getting a context
it wasn't expecting, but apparently nobody hit that for years.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
bfd9efddf990d152dc9912fdca520c5e1e19e1e2 , < 8d8507a457667f23477a15496b91908a5b5b7cf3
(git)
Affected: bfd9efddf990d152dc9912fdca520c5e1e19e1e2 , < 833033e6e55acf11304ff7bbbdf18351d139c281 (git) Affected: bfd9efddf990d152dc9912fdca520c5e1e19e1e2 , < 4e67f504ee9ded15e256b64f4fde150e917381d7 (git) |
|
| Linux | Linux |
Affected:
5.5
Unaffected: 0 , < 5.5 (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-63804 (GCVE-0-2026-63804)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-19 12:02
VLAI
EPSS
VEX
Title
gfs2: fix use-after-free in gfs2_qd_dealloc
Summary
In the Linux kernel, the following vulnerability has been resolved:
gfs2: fix use-after-free in gfs2_qd_dealloc
gfs2_qd_dealloc(), called as an RCU callback from gfs2_qd_dispose(),
accesses the superblock object sdp through qd->qd_sbd after freeing qd.
It does so to decrement sd_quota_count and wake up sd_kill_wait.
However, by the time the RCU callback runs, gfs2_put_super() may have
already freed sdp via free_sbd(). This can happen when
gfs2_quota_cleanup() is called during unmount: it disposes of quota
objects via call_rcu() and then waits on sd_kill_wait with a 60-second
timeout. If the timeout expires, or if gfs2_gl_hash_clear() triggers
additional qd_put() calls that schedule more RCU callbacks after the
wait completes, gfs2_put_super() will proceed to free the superblock
while RCU callbacks referencing it are still pending.
Add an rcu_barrier() before free_sbd() in gfs2_put_super() to ensure
all pending RCU callbacks (including gfs2_qd_dealloc) have completed
before the superblock is freed.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
a475c5dd16e57c570113eccba51955b5df8bb052 , < 4fe388218826df8607ae41a6305df67db08a9093
(git)
Affected: a475c5dd16e57c570113eccba51955b5df8bb052 , < 8745d9f7e1682c39f0a1578895ac74205e2a6757 (git) Affected: a475c5dd16e57c570113eccba51955b5df8bb052 , < b85ef03f726b15047a6fa6d11b639bdf6c0ee4f0 (git) Affected: a475c5dd16e57c570113eccba51955b5df8bb052 , < 9d0d5ba20cad661f7f287d4c66d2c19022ce2fd0 (git) Affected: a475c5dd16e57c570113eccba51955b5df8bb052 , < f9c9ec2c319f843b70ecdf939d48b52d189bc081 (git) |
|
| Linux | Linux |
Affected:
6.6
Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-63803 (GCVE-0-2026-63803)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-24 14:34
VLAI
EPSS
VEX
Title
hdlc_ppp: sync per-proto timers before freeing hdlc state
Summary
In the Linux kernel, the following vulnerability has been resolved:
hdlc_ppp: sync per-proto timers before freeing hdlc state
Each PPP control protocol (LCP/IPCP/IPV6CP) embedded in struct ppp
registers a timer via timer_setup(). That struct ppp is the
hdlc->state allocation, which detach_hdlc_protocol() frees with kfree()
in both teardown paths: unregister_hdlc_device() and the re-attach inside
attach_hdlc_protocol().
The ppp proto never registered a .detach callback, so
detach_hdlc_protocol() performs no timer synchronization before the
kfree(). The only cancel, timer_delete(&proto->timer) in ppp_cp_event(),
is partial (it does not wait for a running callback) and only runs on the
->CLOSED transition; ppp_stop()/ppp_close() do not sync either. A
ppp_timer callback already executing (blocked on ppp->lock) survives the
kfree and then dereferences proto->state / ppp->lock in freed memory,
leading to a use-after-free.
Fix this by adding a .detach helper that calls timer_shutdown_sync() on
every per-proto timer. detach_hdlc_protocol() invokes proto->detach(dev)
before kfree(hdlc->state), so timer_shutdown_sync()
now runs on both free paths.
timer_shutdown_sync() is used instead of timer_delete_sync() because the
keepalive path re-arms the timer through add_timer()/mod_timer() and
shutdown blocks any re-activation during teardown.
Initialize the per-protocol timers in ppp_ioctl() when the protocol is
attached, and remove the now-redundant timer_setup() from ppp_start(), so
that the timers are initialized exactly once at attach time and
ppp_timer_release() never operates on uninitialized timer_list
structures. attach_hdlc_protocol() uses kmalloc() (not kzalloc), so
struct ppp's protos[i].timer is uninitialized garbage until the first
timer_setup(); without this init-at-attach, attaching the PPP protocol
without ever bringing the device up would leave timer_shutdown_sync()
operating on uninitialized memory in .detach. Moving the init out of
ppp_start() (which only runs on NETDEV_UP) into the attach path makes the
initialization unconditional and avoids initializing the same timer_list
twice.
This bug was found by static analysis.
Severity
7.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 86d80a231bde4cfb64bfbfbfffd83056fc93628f
(git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8308122bc9c065b1f376e081ed300129a2ac9545 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ce8f9ddca0c9f217342a8b49efd309aa35b81a36 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 508a0139d3bf60f6a03d2fbfb63a89a9463d983a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c64dbef1c0fbd36f9530aa75112acdf6a6d3cfd8 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5a84398101bf9f11e84b176343e4e3ba83e668c0 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a594debfd4e7ec39413647458907f689ef57fd2f (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c78a4e41ab5ead6193ad8a2dd92e8906bae659fa (git) |
|
| Linux | Linux |
Affected:
2.6.12
Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-63802 (GCVE-0-2026-63802)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
blk-cgroup: fix UAF in __blkcg_rstat_flush()
Summary
In the Linux kernel, the following vulnerability has been resolved:
blk-cgroup: fix UAF in __blkcg_rstat_flush()
When multiple blkgs in the same blkcg are released concurrently,
a use-after-free can occur. The race happens when one blkg's
__blkcg_rstat_flush() removes another blkg's iostat entries via
llist_del_all(). The second blkg sees an empty list and proceeds
to free itself while the first is still iterating over its entries.
Move the flush from __blkg_release() (RCU callback) to blkg_release()
(before call_rcu). This ensures the RCU grace period waits for any
concurrent flush's rcu_read_lock() section to complete before freeing.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
20cb1c2fb7568a6054c55defe044311397e01ddb , < 96e545410c4f74c89d496c1d5d9ef8d08f14368b
(git)
Affected: 20cb1c2fb7568a6054c55defe044311397e01ddb , < bbebd9425cad3573d1527441753899b926525a0f (git) Affected: 20cb1c2fb7568a6054c55defe044311397e01ddb , < 5e5b7f2ef854936e95dceb6a2fdfefcb7152d2c6 (git) Affected: 20cb1c2fb7568a6054c55defe044311397e01ddb , < afebe44facc48a61761e885bbb7f0380d4a603ec (git) Affected: 20cb1c2fb7568a6054c55defe044311397e01ddb , < 0ab5ee5a1badb58cbb2242617cb01a4972b1f2a2 (git) Affected: 0f6090d90f627d8c58f939067d6c6821ce1b3c68 (git) Affected: 6.3.9 , < 6.4 (semver) |
|
| Linux | Linux |
Affected:
6.4
Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-63801 (GCVE-0-2026-63801)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done
Summary
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done
tipc_aead_decrypt() goes straight from tipc_bearer_hold(b) to
crypto_aead_decrypt(req) without taking a reference on the netns, unlike
the encrypt path. When crypto_aead_decrypt() is offloaded asynchronously
(e.g. the SIMD aead wrapper queuing to cryptd), the cryptd worker runs
tipc_aead_decrypt_done() later. If the bearer's netns is torn down in the
meantime, cleanup_net() -> tipc_exit_net() -> tipc_crypto_stop() frees the
per-netns tipc_crypto, and the completion then reads it:
tipc_aead_decrypt_done() dereferences aead->crypto->stats and
aead->crypto->net, and tipc_crypto_rcv_complete() dereferences
aead->crypto->aead[] and the node table -- reading freed memory.
Decoded KASAN splat (v7.1-rc7, CONFIG_KASAN_INLINE + TIPC + TIPC_CRYPTO):
BUG: KASAN: slab-use-after-free in tipc_aead_decrypt_done (net/tipc/crypto.c:999)
Read of size 8 at addr ffff8881056258a8 by task kworker/u16:2/51
Workqueue: events_unbound
Call Trace:
tipc_aead_decrypt_done (net/tipc/crypto.c:999)
process_one_work (kernel/workqueue.c:3314)
worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
kthread (kernel/kthread.c:436)
ret_from_fork (arch/x86/kernel/process.c:158)
ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
Allocated by task 169:
__kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
tipc_crypto_start (net/tipc/crypto.c:1502)
tipc_init_net (net/tipc/core.c:72)
ops_init (net/core/net_namespace.c:137)
setup_net (net/core/net_namespace.c:446)
copy_net_ns (net/core/net_namespace.c:579)
create_new_namespaces (kernel/nsproxy.c:132)
__x64_sys_unshare (kernel/fork.c:3316)
do_syscall_64 (arch/x86/entry/syscall_64.c:63)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
Freed by task 8:
kfree (mm/slub.c:6566)
tipc_exit_net (net/tipc/core.c:119)
cleanup_net (net/core/net_namespace.c:704)
process_one_work (kernel/workqueue.c:3314)
kthread (kernel/kthread.c:436)
This is the same class of bug that commit e279024617134 ("net/tipc: fix
slab-use-after-free Read in tipc_aead_encrypt_done") fixed for the encrypt
side. The encrypt path takes maybe_get_net(aead->crypto->net) before
crypto_aead_encrypt() and drops it with put_net() on the synchronous
return paths and in tipc_aead_encrypt_done(); the -EINPROGRESS/-EBUSY
return keeps the reference for the async callback to release. The decrypt
path was left without the equivalent guard.
Mirror the encrypt-side fix on the decrypt path: take a net reference
before crypto_aead_decrypt() (failing with -ENODEV and the matching
bearer put if it cannot be acquired), keep it across the
-EINPROGRESS/-EBUSY async return, and drop it with put_net() on the
synchronous success/error return and at the end of
tipc_aead_decrypt_done().
Reproduced under KASAN on v7.1-rc7: a UDP bearer with a cluster key is
flooded with crafted encrypted frames from an unknown peer (driving the
cluster-key decrypt path) while the bearer's netns is repeatedly torn
down. The completion must run asynchronously to outlive
tipc_crypto_stop(); on x86 the stock aesni gcm(aes) now decrypts
synchronously, so the async path was exercised via cryptd offload. The
unguarded aead->crypto dereference in tipc_aead_decrypt_done() is the
unpatched upstream path; tipc_aead_decrypt() still lacks
maybe_get_net(aead->crypto->net), so the completion can outlive the free
on any config where crypto_aead_decrypt() goes async.
Found by 0sec automated security-research tooling (https://0sec.ai).
Severity
8.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < 171d31245d11bf84836fad3b394cb465a4d008ec
(git)
Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < 2d1f21419ec121232c916d3a3fc9b6766473a0e7 (git) Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < 0a780653b2a7569a7af9be7d0b00b1251baca63a (git) Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < eaca7dae02fab70c8d223cffe03cec1b93249ce2 (git) Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < dca7713fe044a2067387948557ea099056e1679e (git) Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < e18769616fd5a90ec1e12aabbba544c488284292 (git) Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < 1eea5e1820a2f5164d706bd1277bc97ff31ce32d (git) Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < bda3348872a2ef0d19f2df6aa8cb5025adce2f20 (git) |
|
| Linux | Linux |
Affected:
5.5
Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-63800 (GCVE-0-2026-63800)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
pNFS: Fix use-after-free in pnfs_update_layout()
Summary
In the Linux kernel, the following vulnerability has been resolved:
pNFS: Fix use-after-free in pnfs_update_layout()
When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(),
the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds,
pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(),
which still references 'lo'. This results in a use-after-free when the
tracepoint accesses lo's fields.
Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).
Severity
9.8 (Critical)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
06f58dbc49a23c99e5c0f246879ed16667f7bf8f , < 4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98
(git)
Affected: 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 , < 1f24b8302c77dcaf79c64c073877a3b9f4dd25d2 (git) Affected: 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 , < 9c0fb5c09ae5bd68dc0038692af8127029cb0385 (git) Affected: 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 , < 7e37e9b3e82ade881e1798e2f4fcc54aff7793c1 (git) Affected: 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 , < 2883ddd7542b4437a2ab4908fe2773f690e20889 (git) Affected: 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 , < 200e7637f4d6a1342987045eea72641524f909dc (git) Affected: 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 , < 9645aaf689aff57427ece3b9fa47d5b5399417f4 (git) Affected: 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 , < 13e198a90ca4050f4bee8a3f23680389a6563ccc (git) Affected: aa2399f55eff4ec78330bb6fe55f9df53e5cae0c (git) Affected: 5.10.9 , < 5.10.260 (semver) Affected: 5.4.91 , < 5.5 (semver) |
|
| Linux | Linux |
Affected:
5.11
Unaffected: 0 , < 5.11 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-63799 (GCVE-0-2026-63799)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
sched/mmcid: Fix OOB clear_bit when CID is MM_CID_UNSET in fixup path
Summary
In the Linux kernel, the following vulnerability has been resolved:
sched/mmcid: Fix OOB clear_bit when CID is MM_CID_UNSET in fixup path
In mm_cid_fixup_cpus_to_tasks(), when rq->curr has the target mm and
mm_cid.active is set, the CID is checked with cid_in_transit() before
setting the transition bit. In per-CPU mode a newly forked or exec'd
task can be running with mm_cid.cid == MM_CID_UNSET because CIDs are
assigned lazily on schedule-in. With cid_in_transit() the guard passes
for MM_CID_UNSET (no transit bit), converts it to MM_CID_UNSET |
MM_CID_TRANSIT and stores it back; later mm_cid_schedout() feeds this
to clear_bit() with MM_CID_UNSET as the bit number, triggering an
out-of-bounds write.
Symptoms: this is genuine memory corruption, but a bounded out-of-bounds
write, not an arbitrary one. MM_CID_UNSET is the fixed sentinel BIT(31),
so once the bad value reaches mm_cid_schedout() the cid_from_transit_cid()
strip leaves MM_CID_UNSET, which fails the "cid < max_cids" convergence
test and falls into mm_drop_cid() -> clear_bit(MM_CID_UNSET,
mm_cidmask(mm)). The cid bitmap is embedded in the mm_struct slab object
(after cpu_bitmap and mm_cpus_allowed) and is only num_possible_cpus()
bits wide, so clearing bit 31 is a deterministic OOB bit-clear at a
fixed offset of 2^31 / 8 == 256 MiB past the bitmap base. The address is
not attacker-influenced (fixed sentinel -> fixed offset) and the op only
clears a single bit; what sits 256 MiB further along the direct map is
whatever kernel object happens to live there, so this corrupts one bit of
unpredictable kernel memory -- it is not an arbitrary-address or
arbitrary-value write.
It triggers only in per-CPU CID mode, when a CPU is running an active
task of the target mm whose cid is still MM_CID_UNSET -- the
fork()/execve() window before that task's next schedule-in assigns it a
real CID -- and a per-CPU -> per-task fixup walks over it (the mode
fallback driven by a thread exit, sched_mm_cid_exit(), or by the deferred
max_cids recompute in mm_cid_work_fn()).
In practice syzkaller surfaced it as a KASAN use-after-free reported in
__schedule -> mm_cid_switch_to, where the offending clear_bit() is inlined
via mm_cid_schedout() -> mm_drop_cid().
Guard the transition-bit assignment against MM_CID_UNSET, in addition to
the existing cid_in_transit() check, so the bit is only set on a genuine
task-owned CID. A CPU-owned (MM_CID_ONCPU) CID of a running active task
is handled by the cid_on_cpu(pcp->cid) branch above and never reaches
this path, so excluding MM_CID_UNSET (and the already-transitioning case)
is sufficient.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
fbd0e71dc370af73f6b316e4de9eed273dd90340 , < 8d32856fb72ba976d9c87ba405fd17e80419934c
(git)
Affected: fbd0e71dc370af73f6b316e4de9eed273dd90340 , < de3ab9bd3133899efb92e4cd05ba4203e58fc0a3 (git) |
|
| Linux | Linux |
Affected:
6.19
Unaffected: 0 , < 6.19 (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-63798 (GCVE-0-2026-63798)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-19 12:02
VLAI
EPSS
VEX
Title
irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove
Summary
In the Linux kernel, the following vulnerability has been resolved:
irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove
The driver allocates domain generic chips using
irq_alloc_domain_generic_chips() during probe and sets up chained
handlers using irq_set_chained_handler_and_data(). However, on driver
removal, the generic chips are not freed and the chained handlers are
not removed.
The generic chips remain on the global gc_list and may later be accessed by
generic interrupt chip suspend, resume, or shutdown callbacks after the
driver has been removed, potentially resulting in a use-after-free and
kernel crash.
The chained handlers that were installed in probe for peripheral and
syswake interrupts are also left dangling, which can lead to spurious
interrupts accessing freed memory.
Fix these issues by:
- Setting IRQ_DOMAIN_FLAG_DESTROY_GC flag in domain->flags, so the
core code automatically removes generic chips when irq_domain_remove()
is called
- Clearing all chained handlers with NULL in pdc_intc_remove()
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
b6ef9161e43ad58c3824bd76dc87716276f0cd70 , < 8176773dfceae7978b01c20b233693e072053700
(git)
Affected: b6ef9161e43ad58c3824bd76dc87716276f0cd70 , < c2c7733101bb8c0b29ac9ee41073eaf602821a59 (git) Affected: b6ef9161e43ad58c3824bd76dc87716276f0cd70 , < 83d7ec14b0938ad8cae008058fd6f912f4a9a312 (git) Affected: b6ef9161e43ad58c3824bd76dc87716276f0cd70 , < 44567537a2623dcd2b4018a7f043cf8069579e5d (git) Affected: b6ef9161e43ad58c3824bd76dc87716276f0cd70 , < 41826e5297e67cd96a0a46fde06a5069a8ce436a (git) Affected: b6ef9161e43ad58c3824bd76dc87716276f0cd70 , < b3a3831b2eb884641906fc5e46207b205b6aea13 (git) Affected: b6ef9161e43ad58c3824bd76dc87716276f0cd70 , < 0405a65e4ebd9eac13a765f9f02ac05851ca5421 (git) Affected: b6ef9161e43ad58c3824bd76dc87716276f0cd70 , < 37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057 (git) |
|
| Linux | Linux |
Affected:
3.12
Unaffected: 0 , < 3.12 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-63797 (GCVE-0-2026-63797)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-24 14:34
VLAI
EPSS
VEX
Title
rpmsg: char: Fix use-after-free on probe error path
Summary
In the Linux kernel, the following vulnerability has been resolved:
rpmsg: char: Fix use-after-free on probe error path
rpmsg_chrdev_probe() stores the newly allocated eptdev in the default
endpoint's priv pointer before calling rpmsg_chrdev_eptdev_add(). If
rpmsg_chrdev_eptdev_add() then fails, its error path frees eptdev while
the default endpoint may still dispatch callbacks with the stale priv
pointer.
Avoid publishing eptdev through the default endpoint until
rpmsg_chrdev_eptdev_add() succeeds. Messages received before the priv
pointer is published should be ignored by rpmsg_ept_cb(). Flow-control
updates can hit rpmsg_ept_flow_cb() in the same window, so make both
callbacks return success when priv is NULL.
Severity
8.4 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
bc69d10665690492421d926b1cd9a7a36bffd691 , < 1306fc4f76f765727a6d5aefbf08ef0c8f32996f
(git)
Affected: bc69d10665690492421d926b1cd9a7a36bffd691 , < ddf13f91ca82c94ef7ad9c41a434a03313f8eb1b (git) Affected: bc69d10665690492421d926b1cd9a7a36bffd691 , < c5ebb06c7e24d531b68707168e04698859d642bc (git) Affected: bc69d10665690492421d926b1cd9a7a36bffd691 , < 104d100212396801f1d9d388282f746e23e2bfd6 (git) Affected: bc69d10665690492421d926b1cd9a7a36bffd691 , < ff268cd9ccbce6472a0658791b417bf11c31ee39 (git) Affected: bc69d10665690492421d926b1cd9a7a36bffd691 , < 1ff3f528e67d20e2b1483dcaba899dc7832b2e6b (git) |
|
| Linux | Linux |
Affected:
5.18
Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-63796 (GCVE-0-2026-63796)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
ocfs2: reject oversized group bitmap descriptors
Summary
In the Linux kernel, the following vulnerability has been resolved:
ocfs2: reject oversized group bitmap descriptors
ocfs2_validate_gd_parent() only bounds bg_bits against the parent
allocator's chain geometry. A malicious descriptor can still claim a
bg_size/bg_bits pair that exceeds the bitmap bytes that physically fit in
the group descriptor block, so later bitmap scans and bit updates can run
past bg_bitmap.
Add a physical-cap check based on ocfs2_group_bitmap_size() for the parent
allocator type and reject descriptors whose bg_size or bg_bits exceed that
capacity. Keep the existing chain geometry check so both the on-disk
bitmap layout and the allocator metadata must agree before the descriptor
is used.
Validation reproduced this kernel report:
KASAN use-after-free in _find_next_bit+0x7f/0xc0
Read of size 8
Call trace:
dump_stack_lvl+0x66/0xa0 (?:?)
print_report+0xd0/0x630 (?:?)
_find_next_bit+0x7f/0xc0 (?:?)
srso_alias_return_thunk+0x5/0xfbef5 (?:?)
__virt_addr_valid+0x188/0x2f0 (?:?)
kasan_report+0xe4/0x120 (?:?)
ocfs2_find_max_contig_free_bits+0x35/0x70 (fs/ocfs2/suballoc.c:1375)
ocfs2_block_group_set_bits+0x472/0x4b0 (fs/ocfs2/suballoc.c:1457)
ocfs2_cluster_group_search+0x16b/0x440 (fs/ocfs2/suballoc.c:86)
ocfs2_bg_discontig_fix_result+0x1ef/0x230 (fs/ocfs2/suballoc.c:1786)
ocfs2_search_chain+0x8f8/0x10a0 (fs/ocfs2/suballoc.c:1886)
get_page_from_freelist+0x70e/0x2370 (?:?)
lock_release+0xc6/0x290 (?:?)
do_raw_spin_unlock+0x9a/0x100 (?:?)
kasan_unpoison+0x27/0x60 (?:?)
__bfs+0x147/0x240 (?:?)
get_page_from_freelist+0x83d/0x2370 (?:?)
ocfs2_claim_suballoc_bits+0x38c/0xe70 (fs/ocfs2/suballoc.c:96)
sched_domains_numa_masks_clear+0x70/0xd0 (?:?)
check_irq_usage+0xe8/0xb70 (?:?)
__ocfs2_claim_clusters+0x18d/0x4c0 (fs/ocfs2/suballoc.c:2497)
check_path+0x24/0x50 (?:?)
rcu_is_watching+0x20/0x50 (?:?)
check_prev_add+0xfd/0xd00 (?:?)
ocfs2_add_clusters_in_btree+0x17d/0x810 (fs/ocfs2/suballoc.c:?)
__folio_batch_add_and_move+0x1f5/0x3d0 (?:?)
ocfs2_add_inode_data+0xd9/0x120 (fs/ocfs2/suballoc.c:?)
filemap_add_folio+0x105/0x1f0 (?:?)
ocfs2_write_begin_nolock+0x29f7/0x2f80 (fs/ocfs2/suballoc.c:3043)
ocfs2_read_inode_block+0xb5/0x110 (fs/ocfs2/suballoc.c:?)
down_write+0xf5/0x180 (?:?)
ocfs2_write_begin+0x180/0x240 (fs/ocfs2/suballoc.c:?)
__mark_inode_dirty+0x758/0x9a0 (?:?)
inode_to_bdi+0x41/0x90 (?:?)
balance_dirty_pages_ratelimited_flags+0xf8/0x1d0 (?:?)
generic_perform_write+0x252/0x440 (?:?)
mnt_put_write_access_file+0x16/0x70 (?:?)
file_update_time_flags+0xe4/0x200 (?:?)
ocfs2_file_write_iter+0x80a/0x1320 (fs/ocfs2/suballoc.c:?)
lock_acquire+0x184/0x2f0 (?:?)
ksys_write+0xd2/0x170 (?:?)
apparmor_file_permission+0xf5/0x310 (?:?)
read_zero+0x8d/0x140 (?:?)
lock_is_held_type+0x8f/0x100 (?:?)
Severity
8.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
ccd979bdbce9fba8412beb3f1de68a9d0171b12c , < 336340a0f8a141df8a4eb21a5a86f8ffb87769f6
(git)
Affected: ccd979bdbce9fba8412beb3f1de68a9d0171b12c , < 296c6a42b1174395935ca4cfe8f393e37b698d54 (git) Affected: ccd979bdbce9fba8412beb3f1de68a9d0171b12c , < d2cd59fa848f9f13796ef214d3b1b5ca9a3fe21e (git) Affected: ccd979bdbce9fba8412beb3f1de68a9d0171b12c , < c5a125eadba05ba421c4b55e68da22b4a40d32b4 (git) Affected: ccd979bdbce9fba8412beb3f1de68a9d0171b12c , < 8f9903b0cdbb3155a8899410330b4b4d583a7a5c (git) Affected: ccd979bdbce9fba8412beb3f1de68a9d0171b12c , < 4cd57ebee395041099fcdfcabb00749ce38d8b27 (git) Affected: ccd979bdbce9fba8412beb3f1de68a9d0171b12c , < 99c21e7263248c3f084756bfae08163cc5d6c62f (git) Affected: ccd979bdbce9fba8412beb3f1de68a9d0171b12c , < 9bd541e09dffff27e5bec0f9f45b0228173a5375 (git) |
|
| Linux | Linux |
Affected:
2.6.16
Unaffected: 0 , < 2.6.16 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: reject oversized group bitmap descriptors\n\nocfs2_validate_gd_parent() only bounds bg_bits against the parent\nallocator\u0027s chain geometry. A malicious descriptor can still claim a\nbg_size/bg_bits pair that exceeds the bitmap bytes that physically fit in\nthe group descriptor block, so later bitmap scans and bit updates can run\npast bg_bitmap.\n\nAdd a physical-cap check based on ocfs2_group_bitmap_size() for the parent\nallocator type and reject descriptors whose bg_size or bg_bits exceed that\ncapacity. Keep the existing chain geometry check so both the on-disk\nbitmap layout and the allocator metadata must agree before the descriptor\nis used.\n\nValidation reproduced this kernel report:\nKASAN use-after-free in _find_next_bit+0x7f/0xc0\nRead of size 8\nCall trace:\n dump_stack_lvl+0x66/0xa0 (?:?)\n print_report+0xd0/0x630 (?:?)\n _find_next_bit+0x7f/0xc0 (?:?)\n srso_alias_return_thunk+0x5/0xfbef5 (?:?)\n __virt_addr_valid+0x188/0x2f0 (?:?)\n kasan_report+0xe4/0x120 (?:?)\n ocfs2_find_max_contig_free_bits+0x35/0x70 (fs/ocfs2/suballoc.c:1375)\n ocfs2_block_group_set_bits+0x472/0x4b0 (fs/ocfs2/suballoc.c:1457)\n ocfs2_cluster_group_search+0x16b/0x440 (fs/ocfs2/suballoc.c:86)\n ocfs2_bg_discontig_fix_result+0x1ef/0x230 (fs/ocfs2/suballoc.c:1786)\n ocfs2_search_chain+0x8f8/0x10a0 (fs/ocfs2/suballoc.c:1886)\n get_page_from_freelist+0x70e/0x2370 (?:?)\n lock_release+0xc6/0x290 (?:?)\n do_raw_spin_unlock+0x9a/0x100 (?:?)\n kasan_unpoison+0x27/0x60 (?:?)\n __bfs+0x147/0x240 (?:?)\n get_page_from_freelist+0x83d/0x2370 (?:?)\n ocfs2_claim_suballoc_bits+0x38c/0xe70 (fs/ocfs2/suballoc.c:96)\n sched_domains_numa_masks_clear+0x70/0xd0 (?:?)\n check_irq_usage+0xe8/0xb70 (?:?)\n __ocfs2_claim_clusters+0x18d/0x4c0 (fs/ocfs2/suballoc.c:2497)\n check_path+0x24/0x50 (?:?)\n rcu_is_watching+0x20/0x50 (?:?)\n check_prev_add+0xfd/0xd00 (?:?)\n ocfs2_add_clusters_in_btree+0x17d/0x810 (fs/ocfs2/suballoc.c:?)\n __folio_batch_add_and_move+0x1f5/0x3d0 (?:?)\n ocfs2_add_inode_data+0xd9/0x120 (fs/ocfs2/suballoc.c:?)\n filemap_add_folio+0x105/0x1f0 (?:?)\n ocfs2_write_begin_nolock+0x29f7/0x2f80 (fs/ocfs2/suballoc.c:3043)\n ocfs2_read_inode_block+0xb5/0x110 (fs/ocfs2/suballoc.c:?)\n down_write+0xf5/0x180 (?:?)\n ocfs2_write_begin+0x180/0x240 (fs/ocfs2/suballoc.c:?)\n __mark_inode_dirty+0x758/0x9a0 (?:?)\n inode_to_bdi+0x41/0x90 (?:?)\n balance_dirty_pages_ratelimited_flags+0xf8/0x1d0 (?:?)\n generic_perform_write+0x252/0x440 (?:?)\n mnt_put_write_access_file+0x16/0x70 (?:?)\n file_update_time_flags+0xe4/0x200 (?:?)\n ocfs2_file_write_iter+0x80a/0x1320 (fs/ocfs2/suballoc.c:?)\n lock_acquire+0x184/0x2f0 (?:?)\n ksys_write+0xd2/0x170 (?:?)\n apparmor_file_permission+0xf5/0x310 (?:?)\n read_zero+0x8d/0x140 (?:?)\n lock_is_held_type+0x8f/0x100 (?:?)"
}
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"metrics": [
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"cvssV3_1": {
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"providerMetadata": {
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"title": "ocfs2: reject oversized group bitmap descriptors",
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CVE-2026-63795 (GCVE-0-2026-63795)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
9p: avoid putting oldfid in p9_client_walk() error path
Summary
In the Linux kernel, the following vulnerability has been resolved:
9p: avoid putting oldfid in p9_client_walk() error path
When p9_client_walk() is called with clone set to false, fid aliases
oldfid. If the walk subsequently fails after the request has been sent,
the error path jumps to clunk_fid, which currently calls p9_fid_put(fid)
unconditionally.
This drops a reference to oldfid even though ownership of oldfid remains
with the caller. If this is the last reference, oldfid can be clunked and
destroyed while the caller still expects it to be valid. A later use or
put of oldfid can then trigger a use-after-free or refcount underflow.
Fix this by only putting fid in the clunk_fid error path when it does not
alias oldfid, matching the existing guard in the error path below.
This can be triggered when a multi-component walk is split into multiple
p9_client_walk() calls and a later non-cloning walk fails. A reproducer
and refcount warning logs are available on request.
Severity
10 (Critical)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
b48dbb998d70b7f48c2ec0a15c3cf47136808e4e , < 99c379ca1e221c3d75c7c804ebbf4e5ee37a3070
(git)
Affected: b48dbb998d70b7f48c2ec0a15c3cf47136808e4e , < b84f46179c806450b89821221ea5bd9a1698aba8 (git) Affected: b48dbb998d70b7f48c2ec0a15c3cf47136808e4e , < a61bdcba4f64c2f90d01461913f429ab151f1ca6 (git) Affected: b48dbb998d70b7f48c2ec0a15c3cf47136808e4e , < 6dbe9443d9f5f7fb6d319a7b77108853ae6c6bea (git) Affected: b48dbb998d70b7f48c2ec0a15c3cf47136808e4e , < a7656d368265d085ac9bb85ab31b0cdb72ad8c38 (git) Affected: b48dbb998d70b7f48c2ec0a15c3cf47136808e4e , < 1a3860d46e3eb47dbd60339783cdad7904486b9f (git) |
|
| Linux | Linux |
Affected:
6.0
Unaffected: 0 , < 6.0 (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\n9p: avoid putting oldfid in p9_client_walk() error path\n\nWhen p9_client_walk() is called with clone set to false, fid aliases\noldfid. If the walk subsequently fails after the request has been sent,\nthe error path jumps to clunk_fid, which currently calls p9_fid_put(fid)\nunconditionally.\n\nThis drops a reference to oldfid even though ownership of oldfid remains\nwith the caller. If this is the last reference, oldfid can be clunked and\ndestroyed while the caller still expects it to be valid. A later use or\nput of oldfid can then trigger a use-after-free or refcount underflow.\n\nFix this by only putting fid in the clunk_fid error path when it does not\nalias oldfid, matching the existing guard in the error path below.\n\nThis can be triggered when a multi-component walk is split into multiple\np9_client_walk() calls and a later non-cloning walk fails. A reproducer\nand refcount warning logs are available on request."
}
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"datePublished": "2026-07-19T12:02:04.069Z",
"dateReserved": "2026-07-19T07:54:57.012Z",
"dateUpdated": "2026-07-20T13:40:06.613Z",
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CVE-2026-63794 (GCVE-0-2026-63794)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-19 12:02
VLAI
EPSS
VEX
Title
KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path
In sev_dbg_crypt(), the per-iteration transfer length is bounded by
the source page offset (PAGE_SIZE - s_off) but not by the destination
page offset (PAGE_SIZE - d_off). When d_off > s_off, the encrypt
path (__sev_dbg_encrypt_user) performs a read-modify-write using a
single-page intermediate buffer (dst_tpage):
1. __sev_dbg_decrypt() expands the size to round_up(len + (d_off & 15), 16)
before issuing the PSP command. If len + (d_off & 15) > PAGE_SIZE,
the PSP writes beyond the end of the 4096-byte dst_tpage allocation.
2. The subsequent memcpy()/copy_from_user() into
page_address(dst_tpage) + (d_off & 15) of 'len' bytes overflows
by up to 15 bytes under the same condition.
Trigger example: s_off = 0, d_off = 1, debug.len = PAGE_SIZE -
the PSP is instructed to write round_up(4097, 16) = 4112 bytes to
a 4096-byte buffer.
Fix by also bounding len by (PAGE_SIZE - d_off), the same check that
sev_send_update_data() already performs for its single-page guest
region.
==================================================================
BUG: KASAN: slab-use-after-free in sev_dbg_crypt+0x993/0xd10 [kvm_amd]
Write of size 4095 at addr ff110062293bb009 by task sev_dbg_test/228214
CPU: 96 UID: 0 PID: 228214 Comm: sev_dbg_test Tainted: G U W 7.0.0-smp--5ce9b0c48211-dbg #156 PREEMPTLAZY
Tainted: [U]=USER, [W]=WARN
Hardware name: Google Astoria/astoria, BIOS 0.20250817.1-0 08/25/2025
Call Trace:
<TASK>
dump_stack_lvl+0x54/0x70
print_report+0xbc/0x260
kasan_report+0xa2/0xd0
kasan_check_range+0x25f/0x2c0
__asan_memcpy+0x40/0x70
sev_dbg_crypt+0x993/0xd10 [kvm_amd]
sev_mem_enc_ioctl+0x33c/0x450 [kvm_amd]
kvm_vm_ioctl+0x65d/0x6d0 [kvm]
__se_sys_ioctl+0xb2/0x100
do_syscall_64+0xe8/0x870
entry_SYSCALL_64_after_hwframe+0x4b/0x53
</TASK>
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x7fe72b6a0 pfn:0x62293bb
memcg:ff11000112827d82
flags: 0x1400000000000000(node=1|zone=1)
raw: 1400000000000000 0000000000000000 dead000000000122 0000000000000000
raw: 00000007fe72b6a0 0000000000000000 00000001ffffffff ff11000112827d82
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ff110062293bbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ff110062293bbf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ff110062293bc000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
^
ff110062293bc080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ff110062293bc100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================
Disabling lock debugging due to kernel taint
[sean: add sample KASAN splat, Fixes, and stable@]
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
24f41fb23a39bc2b6f190dcef35a5813a4bf183a , < f701ae476cb92a3a3d8844bb39bb63b4512684c8
(git)
Affected: 24f41fb23a39bc2b6f190dcef35a5813a4bf183a , < 64f2449841ffc7d203183aa4c748c9c77951ecc5 (git) Affected: 24f41fb23a39bc2b6f190dcef35a5813a4bf183a , < 9349b50f4b11f135fe73b56cb2c2c872d8bc71d7 (git) Affected: 24f41fb23a39bc2b6f190dcef35a5813a4bf183a , < 889c2a9c59897ca912bf39df5bb92555a0a13df4 (git) Affected: 24f41fb23a39bc2b6f190dcef35a5813a4bf183a , < e1a0fe288dee07b7da25a71e007c1ecd1080315b (git) Affected: 24f41fb23a39bc2b6f190dcef35a5813a4bf183a , < 720949ed666f34ff28ffdfe1471a5861d1e41fdf (git) Affected: 24f41fb23a39bc2b6f190dcef35a5813a4bf183a , < 2753a097d1fe24c4351c608048612c74108aa89f (git) Affected: 24f41fb23a39bc2b6f190dcef35a5813a4bf183a , < 78ee2d50185a037b3d2452a97f3dad69c3f7f389 (git) |
|
| Linux | Linux |
Affected:
4.16
Unaffected: 0 , < 4.16 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path\n\nIn sev_dbg_crypt(), the per-iteration transfer length is bounded by\nthe source page offset (PAGE_SIZE - s_off) but not by the destination\npage offset (PAGE_SIZE - d_off). When d_off \u003e s_off, the encrypt\npath (__sev_dbg_encrypt_user) performs a read-modify-write using a\nsingle-page intermediate buffer (dst_tpage):\n\n 1. __sev_dbg_decrypt() expands the size to round_up(len + (d_off \u0026 15), 16)\n before issuing the PSP command. If len + (d_off \u0026 15) \u003e PAGE_SIZE,\n the PSP writes beyond the end of the 4096-byte dst_tpage allocation.\n\n 2. The subsequent memcpy()/copy_from_user() into\n page_address(dst_tpage) + (d_off \u0026 15) of \u0027len\u0027 bytes overflows\n by up to 15 bytes under the same condition.\n\nTrigger example: s_off = 0, d_off = 1, debug.len = PAGE_SIZE -\nthe PSP is instructed to write round_up(4097, 16) = 4112 bytes to\na 4096-byte buffer.\n\nFix by also bounding len by (PAGE_SIZE - d_off), the same check that\nsev_send_update_data() already performs for its single-page guest\nregion.\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in sev_dbg_crypt+0x993/0xd10 [kvm_amd]\n Write of size 4095 at addr ff110062293bb009 by task sev_dbg_test/228214\n\n CPU: 96 UID: 0 PID: 228214 Comm: sev_dbg_test Tainted: G U W 7.0.0-smp--5ce9b0c48211-dbg #156 PREEMPTLAZY\n Tainted: [U]=USER, [W]=WARN\n Hardware name: Google Astoria/astoria, BIOS 0.20250817.1-0 08/25/2025\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x54/0x70\n print_report+0xbc/0x260\n kasan_report+0xa2/0xd0\n kasan_check_range+0x25f/0x2c0\n __asan_memcpy+0x40/0x70\n sev_dbg_crypt+0x993/0xd10 [kvm_amd]\n sev_mem_enc_ioctl+0x33c/0x450 [kvm_amd]\n kvm_vm_ioctl+0x65d/0x6d0 [kvm]\n __se_sys_ioctl+0xb2/0x100\n do_syscall_64+0xe8/0x870\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n \u003c/TASK\u003e\n\n The buggy address belongs to the physical page:\n page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x7fe72b6a0 pfn:0x62293bb\n memcg:ff11000112827d82\n flags: 0x1400000000000000(node=1|zone=1)\n raw: 1400000000000000 0000000000000000 dead000000000122 0000000000000000\n raw: 00000007fe72b6a0 0000000000000000 00000001ffffffff ff11000112827d82\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ff110062293bbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ff110062293bbf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n \u003eff110062293bc000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc\n ^\n ff110062293bc080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc\n ff110062293bc100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc\n ==================================================================\n Disabling lock debugging due to kernel taint\n\n[sean: add sample KASAN splat, Fixes, and stable@]"
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"title": "KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path",
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CVE-2026-63793 (GCVE-0-2026-63793)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
ntfs: serialize volume label accesses
Summary
In the Linux kernel, the following vulnerability has been resolved:
ntfs: serialize volume label accesses
Protect vol->volume_label with a mutex and snaphost the label before
copy_to_user. This prevent a use-after-free when FS_IOC_SETFSLABEL
replaces the vol->volume_label and FS_IOC_GETTSLABEL reads it
concurrently.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
9c87959601e80b39a45250e362e6ddfec17cb0fa , < acd744019460bad22e43d4569a502f9c88d331ae
(git)
Affected: 9c87959601e80b39a45250e362e6ddfec17cb0fa , < e9e50ce4f13dc721014af622613409455c734942 (git) |
|
| Linux | Linux |
Affected:
7.1
Unaffected: 0 , < 7.1 (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53403 (GCVE-0-2026-53403)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 06:41
VLAI
EPSS
VEX
Title
fbdev: Fix fb_new_modelist to prevent null-ptr-deref in fb_videomode_to_var
Summary
In the Linux kernel, the following vulnerability has been resolved:
fbdev: Fix fb_new_modelist to prevent null-ptr-deref in fb_videomode_to_var
info->var, a framebuffer's current mode, is expected to have a matching
entry in info->modelist. var_to_display() relies on this and treats a
failed fb_match_mode() as "This should not happen". fb_set_var() keeps it
true by adding the mode to the list on every change, and
do_register_framebuffer() does the same at registration.
store_modes() replaces the modelist from userspace. fb_new_modelist()
validates the new modes but does not check that info->var still has a
match. It relies on fbcon_new_modelist() to re-point consoles, but that
only handles consoles mapped to the framebuffer. With fbcon unbound there
are none, so info->var is left describing a mode that is no longer in the
list.
A later console takeover runs var_to_display(), where fb_match_mode()
returns NULL and leaves fb_display[i].mode NULL. fbcon_switch() passes it
to display_to_var(), and fb_videomode_to_var() dereferences the NULL mode.
Keep the current mode in the list in fb_new_modelist(), the same way
fb_set_var() does.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1458a4d804550b7101e8bb02c1cb941088e4c0c7
(git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8707f02ac9f5f632039b60df2c9f3dc914709f72 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0d8c7f21ad8529d5c181e61f86be35b887ae2e4d (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7640b4f68acb54c2c4f6b4a8aee0e9849dacd929 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4f1a7fe8ba845cb7d39580755f78c3b7b9a0b61e (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < eea16b6f805c0b1fb2f72f0f771088ea45356956 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 88913059c77e171f44ba829282d42dde0d458811 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7f08fc10fa3d3366dc3af723970bd03d7d6d10e3 (git) |
|
| Linux | Linux |
Affected:
2.6.12
Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53402 (GCVE-0-2026-53402)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-24 14:34
VLAI
EPSS
VEX
Title
fbdev: fbcon: fix out-of-bounds read in err_out of fbcon_do_set_font()
Summary
In the Linux kernel, the following vulnerability has been resolved:
fbdev: fbcon: fix out-of-bounds read in err_out of fbcon_do_set_font()
When fbcon_do_set_font() fails (e.g., due to a memory allocation failure
inside vc_resize() under heavy memory pressure), it jumps to the `err_out`
label to roll back the console state. However, the current rollback logic
forgets to restore the `hi_font` state, leading to a severe state machine
corruption.
Earlier in the function, `set_vc_hi_font()` might be called to change
`vc->vc_hi_font_mask` and mutate the screen buffer. If `vc_resize()`
subsequently fails, the `err_out` path restores `vc_font.charcount`
but entirely skips rolling back the `vc_hi_font_mask` and the screen
buffer.
This mismatch leaves the terminal in a desynchronized state. Because
`vc_hi_font_mask` remains set, the VT subsystem will still accept
character indices greater than 255 from userspace and write them to the
screen buffer. Subsequent rendering calls (e.g., `fbcon_putcs()`) will
then use these inflated indices to access the reverted, 256-character
font array, leading to a deterministic out-of-bounds read and potential
kernel memory disclosure.
Fix this by adding the missing rollback logic for the `hi_font` mask
and screen buffer in the error path.
Severity
7.1 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
868749a7456dc48e93887a8474194e2ee6d6c21f , < cb016bcb40c81e7b19c4ae6143babb366dae8e20
(git)
Affected: ebd6f886aa2447fcfcdce5450c9e1028e1d681bb , < ac562193c36696513ae196171892e9338475c4bc (git) Affected: a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 , < 3618a4c5b2591cfa83efe74f5b18c2d02b35c3f5 (git) Affected: a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 , < a7a526fbc847f07ad3a503c7382189be5ab68574 (git) Affected: a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 , < b5bb2c696e140c399cb874def2feedf61dee27d6 (git) Affected: a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 , < 076b1aa65f77a49bce5a48a4a55a397cfcafa2b8 (git) Affected: a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 , < 39815715cbcfabb16fc8c5f4a23deeda20f5df62 (git) Affected: a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 , < 8fdc8c2057eea08d40ce2c8eed41ff9e451c65c2 (git) Affected: f08ccb792d3eaf1dc62d8cbf6a30d6522329f660 (git) Affected: 5.10.249 , < 5.10.261 (semver) Affected: 5.15.64 , < 5.15.212 (semver) Affected: 5.19.6 , < 5.20 (semver) |
|
| Linux | Linux |
Affected:
6.0
Unaffected: 0 , < 6.0 (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: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53401 (GCVE-0-2026-53401)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
fbdev: omap2: fix use-after-free in omapfb_mmap
Summary
In the Linux kernel, the following vulnerability has been resolved:
fbdev: omap2: fix use-after-free in omapfb_mmap
omapfb_mmap() has a race condition with OMAPFB_SETUP_PLANE ioctl that
can lead to use-after-free:
The fb_mmap() entry point holds mm_lock but not lock (fb_info->lock),
while ioctl handlers like OMAPFB_SETUP_PLANE hold lock but not mm_lock.
This allows concurrent execution.
In omapfb_mmap():
1. rg = omapfb_get_mem_region(ofbi->region); // Get old region ref
2. start = omapfb_get_region_paddr(ofbi); // Read from NEW region
3. len = fix->smem_len; // Read from NEW region
4. vm_iomap_memory(vma, start, len); // Map NEW region memory
5. atomic_inc(&rg->map_count); // Increment OLD region!
Concurrently, OMAPFB_SETUP_PLANE can:
- Reassign ofbi->region = new_rg
- Update fix->smem_len
- OMAPFB_SETUP_MEM then checks NEW region's map_count (0!) and frees it
This leaves userspace with a mapping to freed physical memory.
The fix is to read all required values (start, len) from the same
region reference (rg) that will have its map_count incremented,
preventing the region from being freed while still mapped.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
078ff546a806b2c2ab74c25c8edd4c6d4680656a , < 6eb6ebcc8590007ad59ddccc8b5f9201655b33f8
(git)
Affected: 078ff546a806b2c2ab74c25c8edd4c6d4680656a , < 7958e67375aa111522086286bba13cfc0816ce8d (git) |
|
| Linux | Linux |
Affected:
2.6.36
Unaffected: 0 , < 2.6.36 (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53400 (GCVE-0-2026-53400)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-24 14:34
VLAI
EPSS
VEX
Title
i2c: core: fix adapter registration race
Summary
In the Linux kernel, the following vulnerability has been resolved:
i2c: core: fix adapter registration race
Adapters can be looked up based on their id using i2c_get_adapter()
which takes a reference to the embedded struct device.
Make sure that the adapter (including its struct device) has been
initialised before adding it to the IDR to avoid accessing uninitialised
data which could, for example, lead to NULL-pointer dereferences or
use-after-free.
Note that the i2c-dev chardev, which is registered from a bus notifier,
currently uses i2c_get_adapter() so the adapter needs to be added to the
IDR before registration.
Severity
7.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
6e13e641841833cc2aa5baefe89bb04bc388801b , < 2e57c788e71f1763445f812eba4e0b4a2fbd0646
(git)
Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < a4365bc41baaf67f3a5aa8556d23544e6ec7480a (git) Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < 1febb174815bcae56d73587e99e8f87e02f0784d (git) Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < da9d8d9711f78deebc202d0cffcf577e45ee8621 (git) Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < 78793c75dc6d0ff2e4d50ad617349b328a99054e (git) Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < 6a946038f2a5a8c29048c6af369d4e391448a5c5 (git) Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0 (git) Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < ba14d7cf2fe7284610a29854bdff22b2537d3ce6 (git) |
|
| Linux | Linux |
Affected:
2.6.22
Unaffected: 0 , < 2.6.22 (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: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53399 (GCVE-0-2026-53399)
Vulnerability from nvd – Published: 2026-07-19 12:02 – Updated: 2026-07-24 14:34
VLAI
EPSS
VEX
Title
nfsd: release layout stid on setlease failure
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfsd: release layout stid on setlease failure
nfs4_alloc_stid() publishes the new stid into cl->cl_stateids via
idr_alloc_cyclic() under cl_lock before returning to
nfsd4_alloc_layout_stateid(). When nfsd4_layout_setlease() then
fails, the error path frees the layout stateid directly with
kmem_cache_free() without ever calling idr_remove(), leaving the
IDR slot pointing at freed slab memory. Any subsequent IDR walker
(states_show, client teardown) dereferences the dangling pointer.
The correct teardown for an IDR-published stid is nfs4_put_stid(),
which removes the IDR slot under cl_lock, dispatches sc_free
(nfsd4_free_layout_stateid) to release ls->ls_file via
nfsd4_close_layout(), and drops the nfs4_file reference in its
tail.
A second issue blocks that switch: nfsd4_free_layout_stateid()
unconditionally inspects ls->ls_fence_work via
delayed_work_pending() under ls_lock, but
INIT_DELAYED_WORK(&ls->ls_fence_work, ...) currently runs only
after the setlease call. On the setlease-failure path the
destructor would touch an uninitialized delayed_work.
nfsd4_alloc_layout_stateid()
nfs4_alloc_stid() /* idr_alloc_cyclic under cl_lock */
nfsd4_layout_setlease() /* fails */
nfs4_put_stid()
nfsd4_free_layout_stateid()
delayed_work_pending(&ls->ls_fence_work) /* needs INIT */
nfsd4_close_layout() /* nfsd_file_put(ls->ls_file) */
put_nfs4_file()
Fix by hoisting the ls_fenced / ls_fence_delay / INIT_DELAYED_WORK
initialization above the nfsd4_layout_setlease() call, and replace
the manual nfsd_file_put + put_nfs4_file + kmem_cache_free cleanup
with a single nfs4_put_stid(stp).
Severity
9.8 (Critical)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
c5c707f96fc9a6e5a57ca5baac892673270abe3d , < d788ef40a7517d22c97ab01700e4ae4c611b6f2f
(git)
Affected: c5c707f96fc9a6e5a57ca5baac892673270abe3d , < 2e0a5d6d62600b8c614d1b55e50ef94035d6adf9 (git) Affected: c5c707f96fc9a6e5a57ca5baac892673270abe3d , < 7bbb7ce74051c8be4b69ff44ce3db370600dae61 (git) Affected: c5c707f96fc9a6e5a57ca5baac892673270abe3d , < 48a586e382e4db1dbf958d44b63e081df5f8ed04 (git) Affected: c5c707f96fc9a6e5a57ca5baac892673270abe3d , < d369e5edfaaf83a448016e2f1da392b2174be801 (git) Affected: c5c707f96fc9a6e5a57ca5baac892673270abe3d , < 8dee7c278f1c2b5bb80e17a6281c3812fc8b0cdd (git) Affected: c5c707f96fc9a6e5a57ca5baac892673270abe3d , < 83c2b7797742339bb768f83935f7ca33950db138 (git) Affected: c5c707f96fc9a6e5a57ca5baac892673270abe3d , < 30d55c8aabb261bc3f427d6b9aae7ef6206063f9 (git) |
|
| Linux | Linux |
Affected:
4.0
Unaffected: 0 , < 4.0 (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: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: release layout stid on setlease failure\n\nnfs4_alloc_stid() publishes the new stid into cl-\u003ecl_stateids via\nidr_alloc_cyclic() under cl_lock before returning to\nnfsd4_alloc_layout_stateid(). When nfsd4_layout_setlease() then\nfails, the error path frees the layout stateid directly with\nkmem_cache_free() without ever calling idr_remove(), leaving the\nIDR slot pointing at freed slab memory. Any subsequent IDR walker\n(states_show, client teardown) dereferences the dangling pointer.\n\nThe correct teardown for an IDR-published stid is nfs4_put_stid(),\nwhich removes the IDR slot under cl_lock, dispatches sc_free\n(nfsd4_free_layout_stateid) to release ls-\u003els_file via\nnfsd4_close_layout(), and drops the nfs4_file reference in its\ntail.\n\nA second issue blocks that switch: nfsd4_free_layout_stateid()\nunconditionally inspects ls-\u003els_fence_work via\ndelayed_work_pending() under ls_lock, but\nINIT_DELAYED_WORK(\u0026ls-\u003els_fence_work, ...) currently runs only\nafter the setlease call. On the setlease-failure path the\ndestructor would touch an uninitialized delayed_work.\n\n nfsd4_alloc_layout_stateid()\n nfs4_alloc_stid() /* idr_alloc_cyclic under cl_lock */\n nfsd4_layout_setlease() /* fails */\n nfs4_put_stid()\n nfsd4_free_layout_stateid()\n delayed_work_pending(\u0026ls-\u003els_fence_work) /* needs INIT */\n nfsd4_close_layout() /* nfsd_file_put(ls-\u003els_file) */\n put_nfs4_file()\n\nFix by hoisting the ls_fenced / ls_fence_delay / INIT_DELAYED_WORK\ninitialization above the nfsd4_layout_setlease() call, and replace\nthe manual nfsd_file_put + put_nfs4_file + kmem_cache_free cleanup\nwith a single nfs4_put_stid(stp)."
}
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CVE-2026-53398 (GCVE-0-2026-53398)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-20 13:40
VLAI
EPSS
VEX
Title
NFSD: Fix SECINFO_NO_NAME decode error cleanup
Summary
In the Linux kernel, the following vulnerability has been resolved:
NFSD: Fix SECINFO_NO_NAME decode error cleanup
nfsd4_decode_secinfo_no_name() currently initializes sin_exp after
decoding sin_style. If the XDR stream is truncated, the decoder returns
nfserr_bad_xdr before sin_exp is initialized.
Since commit 3fdc54646234 ("NFSD: Reduce amount of struct
nfsd4_compoundargs that needs clearing"), the inline iops array is not
cleared between RPC calls. A failed SECINFO_NO_NAME decode can therefore
leave sin_exp holding stale union contents from a previous operation.
The error response path still invokes nfsd4_secinfo_no_name_release(),
which calls exp_put() on a non-NULL sin_exp.
Initialize sin_exp before the first failable decode step, matching
nfsd4_decode_secinfo().
Severity
9.8 (Critical)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
5e76b25d7cc82c148d391c0c43b884e6427cb302 , < 8836405abdc53ca3dd5fc68b2cf6f8f012fad011
(git)
Affected: 07b68ff5c71cf4ed5443016d8eb116863c0a4d88 , < 49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 5ec37edcb534f3fc92304be236d37f08e6545585 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 1e04be34cafae119e82bcaccd6d28a20f72a3647 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 161d1aaeb04d620d3692639700512bb5038c1e10 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < c8a24effd96d4779e2ad779654682304491c55a5 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 46eb17d45be69d28c7a23ea03283b207426a8232 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 9e18e83b8846a5c3fe13fc8a464b4865d33996c6 (git) Affected: 5.10.220 , < 5.10.260 (semver) Affected: 5.15.154 , < 5.15.211 (semver) |
|
| Linux | Linux |
Affected:
6.1
Unaffected: 0 , < 6.1 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53397 (GCVE-0-2026-53397)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-20 13:39
VLAI
EPSS
VEX
Title
nfsd: fix posix_acl leak on SETACL decode failure
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfsd: fix posix_acl leak on SETACL decode failure
nfsaclsvc_decode_setaclargs() and nfs3svc_decode_setaclargs() each
call nfs_stream_decode_acl() twice, first for NFS_ACL and then for
NFS_DFACL. Each successful call transfers ownership of a freshly
allocated posix_acl into argp->acl_access or argp->acl_default. If
the first call succeeds but the second fails, the decoder returns
false and argp->acl_access is left dangling.
ACLPROC2_SETACL.pc_release was wired to nfssvc_release_attrstat and
ACLPROC3_SETACL.pc_release was wired to nfs3svc_release_fhandle.
Both only call fh_put() and have no knowledge of the ACL fields on
argp. The posix_acl_release() pairs sat at the out: labels inside
nfsacld_proc_setacl() and nfsd3_proc_setacl(), but svc_process()
skips pc_func when pc_decode returns false, so that cleanup is
unreachable on decode failure:
svc_process_common()
pc_decode() /* decode_setaclargs: false */
/* pc_func skipped */
pc_release() /* fh_put only -- ACLs leaked */
The orphaned posix_acl is leaked for the lifetime of the server.
Fix by adding nfsaclsvc_release_setacl() and nfs3svc_release_setacl(),
which release both argp->acl_access and argp->acl_default in addition
to fh_put(), and wiring them as pc_release for their respective SETACL
procedures. pc_release runs on every path svc_process() takes after
decode, including decode failure, so the posix_acl_release() pairs are
removed from the proc functions' out: labels to keep ownership in one
place. This matches the existing release_getacl() pattern used by
the sibling GETACL procedures.
Severity
7.5 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
a257cdd0e2179630d3201c32ba14d7fcb3c3a055 , < b2eb1ffd511d1b3c3e21122f97cbbccea411e277
(git)
Affected: a257cdd0e2179630d3201c32ba14d7fcb3c3a055 , < b94c4be77682aab06d65ca7296149e3bcfb37353 (git) Affected: a257cdd0e2179630d3201c32ba14d7fcb3c3a055 , < 887f92ceccf3eacd5f2402db21254d66372fae00 (git) Affected: a257cdd0e2179630d3201c32ba14d7fcb3c3a055 , < 1e96239fddcefacf6afe6c498357be68eacbcabc (git) Affected: a257cdd0e2179630d3201c32ba14d7fcb3c3a055 , < bd69a825485168ef74e815ecb286754b570fdcc7 (git) Affected: a257cdd0e2179630d3201c32ba14d7fcb3c3a055 , < 136b416593f1349cf6f72c8e3d18f0f204ee8545 (git) Affected: a257cdd0e2179630d3201c32ba14d7fcb3c3a055 , < a5b42c1e4ff2befaa6b96f7cbf32174751eba083 (git) Affected: a257cdd0e2179630d3201c32ba14d7fcb3c3a055 , < 0853ac544c590880d797b04daa33fcb72b6be0e1 (git) |
|
| Linux | Linux |
Affected:
2.6.13
Unaffected: 0 , < 2.6.13 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53396 (GCVE-0-2026-53396)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-20 13:39
VLAI
EPSS
VEX
Title
nfsd: fix posix_acl leak and ignored error in nfsd4_create_file
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfsd: fix posix_acl leak and ignored error in nfsd4_create_file
nfsd4_create_file() has two bugs in its ACL handling:
The return value of nfsd4_acl_to_attr() is silently discarded. When
the NFSv4-to-POSIX ACL conversion fails (e.g., -EINVAL for
unsupported ACE types), the file is created without any ACL and the
client receives NFS4_OK. This violates RFC 7530/8881 which require
the server to reject unsupported attributes on CREATE.
When start_creating() fails after ACL attributes have been populated
in attrs (either via nfsd4_acl_to_attr or via ownership transfer from
open->op_dpacl/op_pacl), the function jumps to out_write which skips
nfsd_attrs_free(). The posix_acl allocations are leaked. A client
can trigger this repeatedly with OPEN(CREATE), ACL attributes, and an
invalid filename (e.g., longer than NAME_MAX).
Fix both by capturing the nfsd4_acl_to_attr() return value and by
changing the early error paths to jump to out instead of out_write.
Initialize child to ERR_PTR(-EINVAL) so that end_creating() is safe
to call even if start_creating() was never reached.
Severity
7.1 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
7ab96df840e60eb933abfe65fc5fe44e72f16dc0 , < 18cf006a08babec0bbac2a3784f8f28e56e47490
(git)
Affected: 7ab96df840e60eb933abfe65fc5fe44e72f16dc0 , < 24c975bbdd564d7d0ad90294bfa69729830345de (git) |
|
| Linux | Linux |
Affected:
6.19
Unaffected: 0 , < 6.19 (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53395 (GCVE-0-2026-53395)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-20 13:39
VLAI
EPSS
VEX
Title
nfsd: fix dead ACL conflict guard in nfsd4_create
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfsd: fix dead ACL conflict guard in nfsd4_create
nfsd4_create() steals create->cr_dpacl/cr_pacl into the local
nfsd_attrs via the designated initializer, then immediately sets the
source pointers to NULL. The subsequent conflict guard tests the
already-nilled source fields, making it permanently dead code:
if (create->cr_acl) {
if (create->cr_dpacl || create->cr_pacl) /* always false */
When a client encodes both FATTR4_WORD0_ACL and
FATTR4_WORD2_POSIX_{DEFAULT,ACCESS}_ACL in the same CREATE fattr
bitmap, nfsd4_acl_to_attr() overwrites attrs.na_pacl/na_dpacl without
releasing the originals, leaking two posix_acl slab objects per
request. Repeated requests cause unbounded slab exhaustion.
Fix by checking attrs.na_dpacl/na_pacl (the stolen values) instead of
the nilled create->cr_dpacl/cr_pacl, matching the correct pattern
already used in nfsd4_setattr().
Severity
7.5 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
d2ca50606f5f0235d7780c1cd73b6614a5d07620 , < 8371cc5c0a2cc2a71b3dcfd47ff1f7fcfc526a5e
(git)
Affected: d2ca50606f5f0235d7780c1cd73b6614a5d07620 , < a60f25a800846ab8e5a13f8a9d05111f2aee55a7 (git) |
|
| Linux | Linux |
Affected:
7.0
Unaffected: 0 , < 7.0 (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53394 (GCVE-0-2026-53394)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-20 13:39
VLAI
EPSS
VEX
Title
nfsd: avoid leaking pre-allocated openowner on unconfirmed retry race
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfsd: avoid leaking pre-allocated openowner on unconfirmed retry race
When find_or_alloc_open_stateowner() encounters an unconfirmed owner, it
calls release_openowner() and sets oo = NULL. Control then falls through
past the `if (oo)` guard -- which would have freed any pre-allocated
`new` -- and unconditionally executes `new = alloc_stateowner(...)`. If
`new` was already allocated on a prior iteration, the pointer is
silently overwritten and the previous allocation (slab object + owner
name buffer) is leaked.
This requires a race: two NFSv4.0 OPEN threads with the same owner
string, where a concurrent thread inserts a new unconfirmed owner into
the hash between retry iterations. The window is narrow but repeatable
under adversarial conditions.
Fix by adding `goto retry` after `oo = NULL` so the already-allocated
`new` is reused on the next iteration rather than overwritten.
Severity
7.5 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
23df17788c6212809848f836b10c4f85b16843a5 , < c9aefb2b5f11337c9202c5bd0c45d71198449718
(git)
Affected: 23df17788c6212809848f836b10c4f85b16843a5 , < 017a6150106b054cc84d1b0582d97bd3a74d4281 (git) Affected: 23df17788c6212809848f836b10c4f85b16843a5 , < a10bf67fe06469a71a401f72f328237345d553c0 (git) Affected: 23df17788c6212809848f836b10c4f85b16843a5 , < 57aee7a35bb12753057c5b65d72d1f46c0e95b07 (git) |
|
| Linux | Linux |
Affected:
6.10
Unaffected: 0 , < 6.10 (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53393 (GCVE-0-2026-53393)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-24 14:33
VLAI
EPSS
VEX
Title
nfsd: reset write verifier on deferred writeback errors
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfsd: reset write verifier on deferred writeback errors
nfsd_vfs_write() and nfsd_commit() both call filemap_check_wb_err() to
detect deferred writeback errors, but neither rotates the server's write
verifier (nn->writeverf) when this check fails. Every other
durable-storage-failure path in these functions calls
commit_reset_write_verifier() before returning an error.
The missing rotation means clients holding UNSTABLE write data under the
current verifier will COMMIT, receive the unchanged verifier back, and
conclude their data is durable — silently dropping data that failed
writeback. This violates the UNSTABLE+COMMIT durability contract
(RFC 1813 §3.3.7, RFC 8881 §18.32).
Add commit_reset_write_verifier() calls at both filemap_check_wb_err()
error sites, matching the pattern used by adjacent error paths in the
same functions. The helper already filters -EAGAIN and -ESTALE
internally, so the calls are unconditionally safe.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
f14816f2f928c560d28ba344af689f56efcd6f55 , < b8e5894e56cff70fa245628fe16f0ad6367f8090
(git)
Affected: 3145fe0ebb16e1715ad541a301bc6675c8375fcd , < bc2baca02ec56da7707a74ed5d340b0a1dff1841 (git) Affected: 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb , < 43b65d2997963e80e8d8d86520bcb1e0751227de (git) Affected: 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb , < 666e837b247fcadf2d8d508b9b0e49d720393eb4 (git) Affected: 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb , < 1dd664b39774a9c89b72de8e59bf9ef4b3aaff2e (git) Affected: 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb , < 4367afc119c51e17a616f6908772b7e2c2c4013f (git) Affected: 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb , < b027cca33c97354149fcc0ddeede4525c41093cd (git) Affected: 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb , < 2090b05803faab8a9fa62fbff871007862cac1b7 (git) Affected: 5.10.124 , < 5.10.261 (semver) Affected: 5.15.49 , < 5.15.212 (semver) |
|
| Linux | Linux |
Affected:
5.17
Unaffected: 0 , < 5.17 (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: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53392 (GCVE-0-2026-53392)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-24 14:33
VLAI
EPSS
VEX
Title
NFSv4/flexfiles: reject zero filehandle version count
Summary
In the Linux kernel, the following vulnerability has been resolved:
NFSv4/flexfiles: reject zero filehandle version count
ff_layout_alloc_lseg() decodes the filehandle-version array count
from the flexfiles layout body. The value is used as the count for
kzalloc_objs(), and the current code only rejects NULL.
A zero count yields ZERO_SIZE_PTR, which can be stored in
dss_info->fh_versions even though later flexfiles paths assume that at
least one filehandle version exists.
Reject fh_count == 0 before the allocation, matching the existing zero
version_count validation in the flexfiles GETDEVICEINFO parser.
A QEMU/KASAN run with a malformed flexfiles layout hit:
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
RIP: 0010:ff_layout_encode_ff_layoutupdate.isra.0+0x15f/0x750
ff_layout_encode_layoutreturn+0x683/0x970
nfs4_xdr_enc_layoutreturn+0x278/0x3a0
Kernel panic - not syncing: Fatal exception
The patched kernel rejects the malformed layout without KASAN/oops/panic,
and a valid fh_count=1 regression still opens, reads, and unmounts cleanly.
Severity
7.5 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
d67ae825a59d639e4d8b82413af84d854617a87e , < 9033591535c066726f5b505126ccb4068b98fa4f
(git)
Affected: d67ae825a59d639e4d8b82413af84d854617a87e , < 18cc6d57a14fa65ab2a2b52279f549041c4bc9cf (git) Affected: d67ae825a59d639e4d8b82413af84d854617a87e , < be7829715e341b42846437dd9e721005db59f0cc (git) Affected: d67ae825a59d639e4d8b82413af84d854617a87e , < eeabb9020721db6bc132e68eeae380b8d4fb4b04 (git) Affected: d67ae825a59d639e4d8b82413af84d854617a87e , < 7779c85028a0676fb190cde4f0c540f4f8e97761 (git) Affected: d67ae825a59d639e4d8b82413af84d854617a87e , < d8c90c7cc061265d5f2813a1f5c82ef2f4707e67 (git) Affected: d67ae825a59d639e4d8b82413af84d854617a87e , < 2131ed64b767ffa8bcdb3677d90f3964e39aabc8 (git) Affected: d67ae825a59d639e4d8b82413af84d854617a87e , < 2c6bb3c40bc24f6aa8dfbe6fe98c3ad6389203f2 (git) |
|
| Linux | Linux |
Affected:
4.0
Unaffected: 0 , < 4.0 (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: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53391 (GCVE-0-2026-53391)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-20 13:39
VLAI
EPSS
VEX
Title
NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr
Summary
In the Linux kernel, the following vulnerability has been resolved:
NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr
nfs4_decode_mp_ds_addr() decodes the r_netid and r_addr opaques of a
netaddr4 from a GETDEVICEINFO multipath-DS body, then immediately
calls strrchr(buf, '.') to locate the port separator. Both decodes
use xdr_stream_decode_string_dup(), and the current code checks only
"nlen < 0" / "rlen < 0" before dereferencing the returned string.
When the on-wire opaque has length zero, xdr_stream_decode_opaque_inline()
returns 0 and xdr_stream_decode_string_dup() falls through to its
"*str = NULL; return ret" tail, leaving buf NULL with a return value
of 0. The "< 0" check does not catch this, and the next line is
strrchr(NULL, '.'), a kernel NULL pointer dereference reachable from
any pNFS-flexfile client mounted against a malicious or compromised
metadata server.
Reject the zero-length cases explicitly so the decoder fails with
-EBADMSG (treated as a malformed GETDEVICEINFO body) instead of
panicking the client.
Severity
7.5 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
6b7f3cf96364eaf597940cb5c68a682894829915 , < 76b94cbd32aacf36a641956385a852635c6802b9
(git)
Affected: 6b7f3cf96364eaf597940cb5c68a682894829915 , < c8e4e0c701d0192a2efb6df059c0f9e19678c23d (git) Affected: 6b7f3cf96364eaf597940cb5c68a682894829915 , < 6c344fff2feff9d4d716d8e4ad40e9b5040ee5ea (git) Affected: 6b7f3cf96364eaf597940cb5c68a682894829915 , < 427ab81a811dab4bca9d19f82eec5847ae42646e (git) Affected: 6b7f3cf96364eaf597940cb5c68a682894829915 , < 012d37a568bfbb2c9686f03ade75560bc7139956 (git) Affected: 6b7f3cf96364eaf597940cb5c68a682894829915 , < 30aae62e50b4e074a90a9a5e15246548fbdc1182 (git) Affected: 6b7f3cf96364eaf597940cb5c68a682894829915 , < 41fe0f7b84f0cb822ae10ab08592996a592b2a25 (git) |
|
| Linux | Linux |
Affected:
4.0
Unaffected: 0 , < 4.0 (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53390 (GCVE-0-2026-53390)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-24 14:33
VLAI
EPSS
VEX
Title
ksmbd: fix out-of-bounds read in smb_check_perm_dacl()
Summary
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix out-of-bounds read in smb_check_perm_dacl()
The permission-check ACE walk in smb_check_perm_dacl() validates the ACE
header size and caps sid.num_subauth at SID_MAX_SUB_AUTHORITIES, but it
never checks that ace->size is actually large enough to contain
num_subauth sub-authorities before compare_sids() dereferences them.
CIFS_SID_BASE_SIZE covers the SID header up to but excluding the
sub_auth[] array, and offsetof(struct smb_ace, sid) is the ACE header,
so the existing guards only guarantee the 8-byte SID base, i.e. zero
sub-authorities. compare_sids() then reads ace->sid.sub_auth[i] for
i < min(local_sid->num_subauth, ace->sid.num_subauth). The local
comparison SIDs (sid_everyone, sid_unix_NFS_mode, and the id_to_sid()
result) always have at least one sub-authority, and an attacker controls
the ACE revision and authority bytes (which lie within the in-bounds SID
base), so they can match one of those SIDs and force the sub_auth read.
A crafted ACE with size == 16 and num_subauth >= 1 placed at the tail of
the security descriptor therefore causes a heap out-of-bounds read of up
to SID_MAX_SUB_AUTHORITIES * sizeof(__le32) bytes past the pntsd
allocation. The security descriptor is loaded by ksmbd_vfs_get_sd_xattr()
into a buffer sized exactly to the on-disk data (kzalloc(sd_size) in
ndr_decode_v4_ntacl()), so the read lands past the allocation. The
malformed descriptor can be stored verbatim via SMB2_SET_INFO (the DACL
is not normalised before being written to the security.NTACL xattr) and
the read fires on a subsequent SMB2_CREATE access check, making this
reachable by an authenticated client on a share that uses ACL xattrs.
Add the missing num_subauth-versus-ace_size check, mirroring the
identical guards already present in the sibling parsers parse_dacl() and
smb_inherit_dacl().
Severity
8.1 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
282cbbb476b9f35793452bc461934af4c7eca169 , < c7488c85fd822959e9b5c22fbd9e7c8a21caf5e0
(git)
Affected: f20adc4ef7428bc485ee83fd1a592252fb87718b , < 988c93d3bba066d8669143e6ec30bb2be9608d53 (git) Affected: 325d4ac11f526cb8964cff14548ccf02d8c756d8 , < 36599894fa8536fefdf1e296c0af71b8b7226859 (git) Affected: 95e5aa3c3261da8c95b27d7aecf8ee39b9f86a4c , < d5c81a095c86fe507c032d08f3a8cfc518444927 (git) Affected: 90089584b2e25c4510b7b987387b4405f0673ece , < 7627ff8c4f9919f14de562b0160ab4ec9d80b1f7 (git) Affected: d07b26f39246a82399661936dd0c853983cfade7 , < e36e35660adb9b8ef1435ac359151dda5f094c55 (git) Affected: d07b26f39246a82399661936dd0c853983cfade7 , < 1ef06004ed4bd6d3ed8c840d9d1a376b66d4935b (git) Affected: 151b1799861fde38087c08f613abc2843ef597b0 (git) Affected: 5.15.210 , < 5.15.212 (semver) Affected: 6.1.176 , < 6.1.177 (semver) Affected: 6.6.140 , < 6.6.144 (semver) Affected: 6.12.84 , < 6.12.95 (semver) Affected: 6.18.25 , < 6.18.38 (semver) Affected: 7.0.2 , < 7.1 (semver) |
|
| Linux | Linux |
Affected:
7.1
Unaffected: 0 , < 7.1 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53389 (GCVE-0-2026-53389)
Vulnerability from nvd – Published: 2026-07-19 12:01 – Updated: 2026-07-20 13:39
VLAI
EPSS
VEX
Title
net/tcp-ao: fix use-after-free of key in del_async path
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/tcp-ao: fix use-after-free of key in del_async path
In tcp_ao_delete_key(), the del_async path skips the current_key
and rnext_key validity checks present in the synchronous path,
assuming these pointers are always NULL on LISTEN sockets. However,
if a key was added with set_current=1/set_rnext=1 while the socket
was in CLOSE state, current_key and rnext_key will be non-NULL
after listen() transitions the socket to LISTEN.
When such a key is deleted with del_async=1, hlist_del_rcu() and
call_rcu() free the key without clearing the dangling pointers.
After the RCU grace period, getsockopt(TCP_AO_INFO) dereferences
current_key->sndid and rnext_key->rcvid from freed slab memory.
Clear current_key and rnext_key in the del_async path when they
reference the key being deleted.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
d6732b95b6fbbc6d5bb9d2f809e275763640c4a2 , < 6ce7ef41743740ce15c2061561b784148b565b3f
(git)
Affected: d6732b95b6fbbc6d5bb9d2f809e275763640c4a2 , < e77fbefd1269b5c123e7c651a1ebdce1b87d19a0 (git) Affected: d6732b95b6fbbc6d5bb9d2f809e275763640c4a2 , < 7ddc29a094d96e9b3aa280433c6dc443df9eabf2 (git) Affected: d6732b95b6fbbc6d5bb9d2f809e275763640c4a2 , < 5ba9950bc9078e19b69cca1e56d1553b125c6857 (git) |
|
| Linux | Linux |
Affected:
6.7
Unaffected: 0 , < 6.7 (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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"lessThan": "6.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.95",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.38",
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},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.3",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"versionEndExcluding": "6.12.95",
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"vulnerable": true
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{
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"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tcp-ao: fix use-after-free of key in del_async path\n\nIn tcp_ao_delete_key(), the del_async path skips the current_key\nand rnext_key validity checks present in the synchronous path,\nassuming these pointers are always NULL on LISTEN sockets. However,\nif a key was added with set_current=1/set_rnext=1 while the socket\nwas in CLOSE state, current_key and rnext_key will be non-NULL\nafter listen() transitions the socket to LISTEN.\n\nWhen such a key is deleted with del_async=1, hlist_del_rcu() and\ncall_rcu() free the key without clearing the dangling pointers.\nAfter the RCU grace period, getsockopt(TCP_AO_INFO) dereferences\ncurrent_key-\u003esndid and rnext_key-\u003ercvid from freed slab memory.\n\nClear current_key and rnext_key in the del_async path when they\nreference the key being deleted."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-20T13:39:52.858Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/6ce7ef41743740ce15c2061561b784148b565b3f"
},
{
"url": "https://git.kernel.org/stable/c/e77fbefd1269b5c123e7c651a1ebdce1b87d19a0"
},
{
"url": "https://git.kernel.org/stable/c/7ddc29a094d96e9b3aa280433c6dc443df9eabf2"
},
{
"url": "https://git.kernel.org/stable/c/5ba9950bc9078e19b69cca1e56d1553b125c6857"
}
],
"title": "net/tcp-ao: fix use-after-free of key in del_async path",
"x_generator": {
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}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-53389",
"datePublished": "2026-07-19T12:01:54.386Z",
"dateReserved": "2026-06-09T07:44:35.402Z",
"dateUpdated": "2026-07-20T13:39:52.858Z",
"state": "PUBLISHED"
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}