CVE-2022-49179 (GCVE-0-2022-49179)
Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2026-08-12 23:58
VLAI
EPSS
VEX
Title
block, bfq: don't move oom_bfqq
Summary
In the Linux kernel, the following vulnerability has been resolved:
block, bfq: don't move oom_bfqq
Our test report a UAF:
[ 2073.019181] ==================================================================
[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168
[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584
[ 2073.019192]
[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5
[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[ 2073.019200] Call trace:
[ 2073.019203] dump_backtrace+0x0/0x310
[ 2073.019206] show_stack+0x28/0x38
[ 2073.019210] dump_stack+0xec/0x15c
[ 2073.019216] print_address_description+0x68/0x2d0
[ 2073.019220] kasan_report+0x238/0x2f0
[ 2073.019224] __asan_store8+0x88/0xb0
[ 2073.019229] __bfq_put_async_bfqq+0xa0/0x168
[ 2073.019233] bfq_put_async_queues+0xbc/0x208
[ 2073.019236] bfq_pd_offline+0x178/0x238
[ 2073.019240] blkcg_deactivate_policy+0x1f0/0x420
[ 2073.019244] bfq_exit_queue+0x128/0x178
[ 2073.019249] blk_mq_exit_sched+0x12c/0x160
[ 2073.019252] elevator_exit+0xc8/0xd0
[ 2073.019256] blk_exit_queue+0x50/0x88
[ 2073.019259] blk_cleanup_queue+0x228/0x3d8
[ 2073.019267] null_del_dev+0xfc/0x1e0 [null_blk]
[ 2073.019274] null_exit+0x90/0x114 [null_blk]
[ 2073.019278] __arm64_sys_delete_module+0x358/0x5a0
[ 2073.019282] el0_svc_common+0xc8/0x320
[ 2073.019287] el0_svc_handler+0xf8/0x160
[ 2073.019290] el0_svc+0x10/0x218
[ 2073.019291]
[ 2073.019294] Allocated by task 14163:
[ 2073.019301] kasan_kmalloc+0xe0/0x190
[ 2073.019305] kmem_cache_alloc_node_trace+0x1cc/0x418
[ 2073.019308] bfq_pd_alloc+0x54/0x118
[ 2073.019313] blkcg_activate_policy+0x250/0x460
[ 2073.019317] bfq_create_group_hierarchy+0x38/0x110
[ 2073.019321] bfq_init_queue+0x6d0/0x948
[ 2073.019325] blk_mq_init_sched+0x1d8/0x390
[ 2073.019330] elevator_switch_mq+0x88/0x170
[ 2073.019334] elevator_switch+0x140/0x270
[ 2073.019338] elv_iosched_store+0x1a4/0x2a0
[ 2073.019342] queue_attr_store+0x90/0xe0
[ 2073.019348] sysfs_kf_write+0xa8/0xe8
[ 2073.019351] kernfs_fop_write+0x1f8/0x378
[ 2073.019359] __vfs_write+0xe0/0x360
[ 2073.019363] vfs_write+0xf0/0x270
[ 2073.019367] ksys_write+0xdc/0x1b8
[ 2073.019371] __arm64_sys_write+0x50/0x60
[ 2073.019375] el0_svc_common+0xc8/0x320
[ 2073.019380] el0_svc_handler+0xf8/0x160
[ 2073.019383] el0_svc+0x10/0x218
[ 2073.019385]
[ 2073.019387] Freed by task 72584:
[ 2073.019391] __kasan_slab_free+0x120/0x228
[ 2073.019394] kasan_slab_free+0x10/0x18
[ 2073.019397] kfree+0x94/0x368
[ 2073.019400] bfqg_put+0x64/0xb0
[ 2073.019404] bfqg_and_blkg_put+0x90/0xb0
[ 2073.019408] bfq_put_queue+0x220/0x228
[ 2073.019413] __bfq_put_async_bfqq+0x98/0x168
[ 2073.019416] bfq_put_async_queues+0xbc/0x208
[ 2073.019420] bfq_pd_offline+0x178/0x238
[ 2073.019424] blkcg_deactivate_policy+0x1f0/0x420
[ 2073.019429] bfq_exit_queue+0x128/0x178
[ 2073.019433] blk_mq_exit_sched+0x12c/0x160
[ 2073.019437] elevator_exit+0xc8/0xd0
[ 2073.019440] blk_exit_queue+0x50/0x88
[ 2073.019443] blk_cleanup_queue+0x228/0x3d8
[ 2073.019451] null_del_dev+0xfc/0x1e0 [null_blk]
[ 2073.019459] null_exit+0x90/0x114 [null_blk]
[ 2073.019462] __arm64_sys_delete_module+0x358/0x5a0
[ 2073.019467] el0_svc_common+0xc8/0x320
[ 2073.019471] el0_svc_handler+0xf8/0x160
[ 2073.019474] el0_svc+0x10/0x218
[ 2073.019475]
[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00
which belongs to the cache kmalloc-1024 of size 1024
[ 2073.019484] The buggy address is located 552 bytes inside of
1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)
[ 2073.019486] The buggy address belongs to the page:
[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0
[ 2073.020123] flags: 0x7ffff0000008100(slab|head)
[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00
[ 2073.020409] ra
---truncated---
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 17:59 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
0d52af590552473666da5b6111e7182d6cd23f92 , < c4f5a678add58a8a0e7ee5e038496b376ea6d205
(git)
Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < 7507ead1e9d42957c2340f2c4a0e9d00034e3366 (git) Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < 8f34dea99cd7761156a146a5258a67d045d862f7 (git) Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < 87fdfe8589d43e471dffb4c60f75eeb6f37afc4c (git) Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < c01fced8d38fbccc82787065229578006f28e020 (git) Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < 8410f70977734f21b8ed45c37e925d311dfda2e7 (git) |
guessed | |
| Linux | Linux |
Affected:
4.16
Unaffected: 0 , < 4.16 (semver) Unaffected: 5.4.189 , ≤ 5.4.* (semver) Unaffected: 5.10.110 , ≤ 5.10.* (semver) Unaffected: 5.15.33 , ≤ 5.15.* (semver) Unaffected: 5.16.19 , ≤ 5.16.* (semver) Unaffected: 5.17.2 , ≤ 5.17.* (semver) Unaffected: 5.18 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-49179",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-27T17:59:03.662860Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
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"descriptions": [
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"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
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"providerMetadata": {
"dateUpdated": "2025-02-27T18:02:29.552Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"block/bfq-cgroup.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"versionType": "git"
},
{
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"status": "affected",
"version": "0d52af590552473666da5b6111e7182d6cd23f92",
"versionType": "git"
},
{
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"status": "affected",
"version": "0d52af590552473666da5b6111e7182d6cd23f92",
"versionType": "git"
},
{
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"version": "0d52af590552473666da5b6111e7182d6cd23f92",
"versionType": "git"
},
{
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{
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"status": "affected",
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"versionType": "git"
}
]
},
{
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"product": "Linux",
"programFiles": [
"block/bfq-cgroup.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.16"
},
{
"lessThan": "4.16",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.189",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.110",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.33",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.16.*",
"status": "unaffected",
"version": "5.16.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.17.*",
"status": "unaffected",
"version": "5.17.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.189",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.110",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.33",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.16.19",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.17.2",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.18",
"versionStartIncluding": "4.16",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: don\u0027t move oom_bfqq\n\nOur test report a UAF:\n\n[ 2073.019181] ==================================================================\n[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584\n[ 2073.019192]\n[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5\n[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n[ 2073.019200] Call trace:\n[ 2073.019203] dump_backtrace+0x0/0x310\n[ 2073.019206] show_stack+0x28/0x38\n[ 2073.019210] dump_stack+0xec/0x15c\n[ 2073.019216] print_address_description+0x68/0x2d0\n[ 2073.019220] kasan_report+0x238/0x2f0\n[ 2073.019224] __asan_store8+0x88/0xb0\n[ 2073.019229] __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019233] bfq_put_async_queues+0xbc/0x208\n[ 2073.019236] bfq_pd_offline+0x178/0x238\n[ 2073.019240] blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019244] bfq_exit_queue+0x128/0x178\n[ 2073.019249] blk_mq_exit_sched+0x12c/0x160\n[ 2073.019252] elevator_exit+0xc8/0xd0\n[ 2073.019256] blk_exit_queue+0x50/0x88\n[ 2073.019259] blk_cleanup_queue+0x228/0x3d8\n[ 2073.019267] null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019274] null_exit+0x90/0x114 [null_blk]\n[ 2073.019278] __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019282] el0_svc_common+0xc8/0x320\n[ 2073.019287] el0_svc_handler+0xf8/0x160\n[ 2073.019290] el0_svc+0x10/0x218\n[ 2073.019291]\n[ 2073.019294] Allocated by task 14163:\n[ 2073.019301] kasan_kmalloc+0xe0/0x190\n[ 2073.019305] kmem_cache_alloc_node_trace+0x1cc/0x418\n[ 2073.019308] bfq_pd_alloc+0x54/0x118\n[ 2073.019313] blkcg_activate_policy+0x250/0x460\n[ 2073.019317] bfq_create_group_hierarchy+0x38/0x110\n[ 2073.019321] bfq_init_queue+0x6d0/0x948\n[ 2073.019325] blk_mq_init_sched+0x1d8/0x390\n[ 2073.019330] elevator_switch_mq+0x88/0x170\n[ 2073.019334] elevator_switch+0x140/0x270\n[ 2073.019338] elv_iosched_store+0x1a4/0x2a0\n[ 2073.019342] queue_attr_store+0x90/0xe0\n[ 2073.019348] sysfs_kf_write+0xa8/0xe8\n[ 2073.019351] kernfs_fop_write+0x1f8/0x378\n[ 2073.019359] __vfs_write+0xe0/0x360\n[ 2073.019363] vfs_write+0xf0/0x270\n[ 2073.019367] ksys_write+0xdc/0x1b8\n[ 2073.019371] __arm64_sys_write+0x50/0x60\n[ 2073.019375] el0_svc_common+0xc8/0x320\n[ 2073.019380] el0_svc_handler+0xf8/0x160\n[ 2073.019383] el0_svc+0x10/0x218\n[ 2073.019385]\n[ 2073.019387] Freed by task 72584:\n[ 2073.019391] __kasan_slab_free+0x120/0x228\n[ 2073.019394] kasan_slab_free+0x10/0x18\n[ 2073.019397] kfree+0x94/0x368\n[ 2073.019400] bfqg_put+0x64/0xb0\n[ 2073.019404] bfqg_and_blkg_put+0x90/0xb0\n[ 2073.019408] bfq_put_queue+0x220/0x228\n[ 2073.019413] __bfq_put_async_bfqq+0x98/0x168\n[ 2073.019416] bfq_put_async_queues+0xbc/0x208\n[ 2073.019420] bfq_pd_offline+0x178/0x238\n[ 2073.019424] blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019429] bfq_exit_queue+0x128/0x178\n[ 2073.019433] blk_mq_exit_sched+0x12c/0x160\n[ 2073.019437] elevator_exit+0xc8/0xd0\n[ 2073.019440] blk_exit_queue+0x50/0x88\n[ 2073.019443] blk_cleanup_queue+0x228/0x3d8\n[ 2073.019451] null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019459] null_exit+0x90/0x114 [null_blk]\n[ 2073.019462] __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019467] el0_svc_common+0xc8/0x320\n[ 2073.019471] el0_svc_handler+0xf8/0x160\n[ 2073.019474] el0_svc+0x10/0x218\n[ 2073.019475]\n[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00\n which belongs to the cache kmalloc-1024 of size 1024\n[ 2073.019484] The buggy address is located 552 bytes inside of\n 1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)\n[ 2073.019486] The buggy address belongs to the page:\n[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0\n[ 2073.020123] flags: 0x7ffff0000008100(slab|head)\n[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00\n[ 2073.020409] ra\n---truncated---"
}
],
"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"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable BFQ cgroup path is reached through local block I/O (read/write syscalls) and blkcg association changes on a BFQ-managed queue, not via network packet processing.\nAC:L - An attacker can induce the oom_bfqq fallback via memory pressure they control, then trigger bfq_bfqq_move through cgroup-associated I/O; BFQ with group scheduling is a common real-world configuration, not a rare dependency.\nPR:L - An unprivileged local user can submit I/O on BFQ devices and cause bios/tasks to span blkcgs (app cgroups, writeback, delegated/user scopes); CAP_SYS_ADMIN is not required to reach the buggy move path.\nUI:N - The attacker performs the I/O and cgroup-related actions themselves; no separate victim interaction is required.\nS:U - This is a kernel memory-corruption bug within the host kernel\u0027s authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - The bug is a use-after-free with a confirmed write to a freed bfq_group; UAF control of freed object contents enables arbitrary kernel memory disclosure.\nI:H - The KASAN report shows an 8-byte write to freed memory in __bfq_put_async_bfqq during group teardown, which is exploitable for heap corruption and control-flow hijacking.\nA:H - The use-after-free causes kernel oops/panic during elevator/device teardown and can crash the system even without a full exploit."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-12T23:58:15.467Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c4f5a678add58a8a0e7ee5e038496b376ea6d205"
},
{
"url": "https://git.kernel.org/stable/c/7507ead1e9d42957c2340f2c4a0e9d00034e3366"
},
{
"url": "https://git.kernel.org/stable/c/8f34dea99cd7761156a146a5258a67d045d862f7"
},
{
"url": "https://git.kernel.org/stable/c/87fdfe8589d43e471dffb4c60f75eeb6f37afc4c"
},
{
"url": "https://git.kernel.org/stable/c/c01fced8d38fbccc82787065229578006f28e020"
},
{
"url": "https://git.kernel.org/stable/c/8410f70977734f21b8ed45c37e925d311dfda2e7"
}
],
"title": "block, bfq: don\u0027t move oom_bfqq",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-49179",
"datePublished": "2025-02-26T01:55:32.100Z",
"dateReserved": "2025-02-26T01:49:39.281Z",
"dateUpdated": "2026-08-12T23:58:15.467Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2022-49179",
"date": "2026-11-10",
"epss": "0.00277",
"percentile": "0.20313"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"block/bfq-cgroup.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
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},
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{
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},
{
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"versionType": "git"
},
{
"lessThan": "c01fced8d38fbccc82787065229578006f28e020",
"status": "affected",
"version": "0d52af590552473666da5b6111e7182d6cd23f92",
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},
{
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"status": "affected",
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"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"block/bfq-cgroup.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.16"
},
{
"lessThan": "4.16",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.189",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.110",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.33",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.16.*",
"status": "unaffected",
"version": "5.16.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.17.*",
"status": "unaffected",
"version": "5.17.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4AAE7A78-57E5-45A6-860D-7867DA88A45E",
"versionEndExcluding": "5.4.189",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "91D3BFD0-D3F3-4018-957C-96CCBF357D79",
"versionEndExcluding": "5.10.110",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
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"matchCriteriaId": "20C43679-0439-405A-B97F-685BEE50613B",
"versionEndExcluding": "5.16.19",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "210C679C-CF84-44A3-8939-E629C87E54BF",
"versionEndExcluding": "5.17.2",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: don\u0027t move oom_bfqq\n\nOur test report a UAF:\n\n[ 2073.019181] ==================================================================\n[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584\n[ 2073.019192]\n[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5\n[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n[ 2073.019200] Call trace:\n[ 2073.019203] dump_backtrace+0x0/0x310\n[ 2073.019206] show_stack+0x28/0x38\n[ 2073.019210] dump_stack+0xec/0x15c\n[ 2073.019216] print_address_description+0x68/0x2d0\n[ 2073.019220] kasan_report+0x238/0x2f0\n[ 2073.019224] __asan_store8+0x88/0xb0\n[ 2073.019229] __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019233] bfq_put_async_queues+0xbc/0x208\n[ 2073.019236] bfq_pd_offline+0x178/0x238\n[ 2073.019240] blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019244] bfq_exit_queue+0x128/0x178\n[ 2073.019249] blk_mq_exit_sched+0x12c/0x160\n[ 2073.019252] elevator_exit+0xc8/0xd0\n[ 2073.019256] blk_exit_queue+0x50/0x88\n[ 2073.019259] blk_cleanup_queue+0x228/0x3d8\n[ 2073.019267] null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019274] null_exit+0x90/0x114 [null_blk]\n[ 2073.019278] __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019282] el0_svc_common+0xc8/0x320\n[ 2073.019287] el0_svc_handler+0xf8/0x160\n[ 2073.019290] el0_svc+0x10/0x218\n[ 2073.019291]\n[ 2073.019294] Allocated by task 14163:\n[ 2073.019301] kasan_kmalloc+0xe0/0x190\n[ 2073.019305] kmem_cache_alloc_node_trace+0x1cc/0x418\n[ 2073.019308] bfq_pd_alloc+0x54/0x118\n[ 2073.019313] blkcg_activate_policy+0x250/0x460\n[ 2073.019317] bfq_create_group_hierarchy+0x38/0x110\n[ 2073.019321] bfq_init_queue+0x6d0/0x948\n[ 2073.019325] blk_mq_init_sched+0x1d8/0x390\n[ 2073.019330] elevator_switch_mq+0x88/0x170\n[ 2073.019334] elevator_switch+0x140/0x270\n[ 2073.019338] elv_iosched_store+0x1a4/0x2a0\n[ 2073.019342] queue_attr_store+0x90/0xe0\n[ 2073.019348] sysfs_kf_write+0xa8/0xe8\n[ 2073.019351] kernfs_fop_write+0x1f8/0x378\n[ 2073.019359] __vfs_write+0xe0/0x360\n[ 2073.019363] vfs_write+0xf0/0x270\n[ 2073.019367] ksys_write+0xdc/0x1b8\n[ 2073.019371] __arm64_sys_write+0x50/0x60\n[ 2073.019375] el0_svc_common+0xc8/0x320\n[ 2073.019380] el0_svc_handler+0xf8/0x160\n[ 2073.019383] el0_svc+0x10/0x218\n[ 2073.019385]\n[ 2073.019387] Freed by task 72584:\n[ 2073.019391] __kasan_slab_free+0x120/0x228\n[ 2073.019394] kasan_slab_free+0x10/0x18\n[ 2073.019397] kfree+0x94/0x368\n[ 2073.019400] bfqg_put+0x64/0xb0\n[ 2073.019404] bfqg_and_blkg_put+0x90/0xb0\n[ 2073.019408] bfq_put_queue+0x220/0x228\n[ 2073.019413] __bfq_put_async_bfqq+0x98/0x168\n[ 2073.019416] bfq_put_async_queues+0xbc/0x208\n[ 2073.019420] bfq_pd_offline+0x178/0x238\n[ 2073.019424] blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019429] bfq_exit_queue+0x128/0x178\n[ 2073.019433] blk_mq_exit_sched+0x12c/0x160\n[ 2073.019437] elevator_exit+0xc8/0xd0\n[ 2073.019440] blk_exit_queue+0x50/0x88\n[ 2073.019443] blk_cleanup_queue+0x228/0x3d8\n[ 2073.019451] null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019459] null_exit+0x90/0x114 [null_blk]\n[ 2073.019462] __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019467] el0_svc_common+0xc8/0x320\n[ 2073.019471] el0_svc_handler+0xf8/0x160\n[ 2073.019474] el0_svc+0x10/0x218\n[ 2073.019475]\n[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00\n which belongs to the cache kmalloc-1024 of size 1024\n[ 2073.019484] The buggy address is located 552 bytes inside of\n 1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)\n[ 2073.019486] The buggy address belongs to the page:\n[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0\n[ 2073.020123] flags: 0x7ffff0000008100(slab|head)\n[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00\n[ 2073.020409] ra\n---truncated---"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block, bfq: don\u0027t move oom_bfqq Nuestro informe de prueba es un UAF: [ 2073.019181] ======================================================================= [ 2073.019188] ERROR: KASAN: use-after-free en __bfq_put_async_bfqq+0xa0/0x168 [ 2073.019191] Escritura de tama\u00f1o 8 en la direcci\u00f3n ffff8000ccf64128 por la tarea rmmod/72584 [ 2073.019192] [ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: cargado No contaminado 4.19.90-yk #5 [ 2073.019198] Nombre del hardware: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 [ 2073.019200] Rastreo de llamadas: [ 2073.019203] dump_backtrace+0x0/0x310 [ 2073.019206] show_stack+0x28/0x38 [ 2073.019210] dump_stack+0xec/0x15c [ 2073.019216] print_address_description+0x68/0x2d0 [ 2073.019220] kasan_report+0x238/0x2f0 [ 2073.019224] __asan_store8+0x88/0xb0 [ 2073.019229] __bfq_put_async_bfqq+0xa0/0x168 [ 2073.019233] bfq_put_async_queues+0xbc/0x208 [ 2073.019236] bfq_pd_offline+0x178/0x238 [ 2073.019240] blkcg_deactivate_policy+0x1f0/0x420 [ 2073.019244] bfq_exit_queue+0x128/0x178 [ 2073.019249] blk_mq_exit_sched+0x12c/0x160 [ 2073.019252] elevator_exit+0xc8/0xd0 [ 2073.019256] blk_exit_queue+0x50/0x88 [ 2073.019259] blk_cleanup_queue+0x228/0x3d8 [ 2073.019267] null_del_dev+0xfc/0x1e0 [null_blk] [ 2073.019274] null_exit+0x90/0x114 [null_blk] [ 2073.019278] __arm64_sys_delete_module+0x358/0x5a0 [ 2073.019282] el0_svc_common+0xc8/0x320 [ 2073.019287] el0_svc_handler+0xf8/0x160 [ 2073.019290] el0_svc+0x10/0x218 [ 2073.019291] [ 2073.019294] Asignado por la tarea 14163: [ 2073.019301] kasan_kmalloc+0xe0/0x190 [ 2073.019305] kmem_cache_alloc_node_trace+0x1cc/0x418 [ 2073.019308] bfq_pd_alloc+0x54/0x118 [ 2073.019313] blkcg_activate_policy+0x250/0x460 [ 2073.019317] bfq_create_group_hierarchy+0x38/0x110 [ 2073.019321] bfq_init_queue+0x6d0/0x948 [ 2073.019325] blk_mq_init_sched+0x1d8/0x390 [ 2073.019330] elevator_switch_mq+0x88/0x170 [ 2073.019334] elevator_switch+0x140/0x270 [ 2073.019338] elv_iosched_store+0x1a4/0x2a0 [ 2073.019342] queue_attr_store+0x90/0xe0 [ 2073.019348] sysfs_kf_write+0xa8/0xe8 [ 2073.019351] kernfs_fop_write+0x1f8/0x378 [ 2073.019359] __vfs_write+0xe0/0x360 [ 2073.019363] vfs_write+0xf0/0x270 [ 2073.019367] ksys_write+0xdc/0x1b8 [ 2073.019371] __arm64_sys_write+0x50/0x60 [ 2073.019375] el0_svc_common+0xc8/0x320 [ 2073.019380] el0_svc_handler+0xf8/0x160 [ 2073.019383] el0_svc+0x10/0x218 [ 2073.019385] [ 2073.019387] Liberado por la tarea 72584: [ 2073.019391] __kasan_slab_free+0x120/0x228 [ 2073.019394] kasan_slab_free+0x10/0x18 [ 2073.019397] kfree+0x94/0x368 [ 2073.019400] bfqg_put+0x64/0xb0 [ 2073.019404] bfqg_and_blkg_put+0x90/0xb0 [ 2073.019408] bfq_put_queue+0x220/0x228 [ 2073.019413] __bfq_put_async_bfqq+0x98/0x168 [ 2073.019416] bfq_put_async_queues+0xbc/0x208 [ 2073.019420] bfq_pd_offline+0x178/0x238 [ 2073.019424] blkcg_deactivate_policy+0x1f0/0x420 [ 2073.019429] bfq_exit_queue+0x128/0x178 [ 2073.019433] blk_mq_exit_sched+0x12c/0x160 [ 2073.019437] elevator_exit+0xc8/0xd0 [ 2073.019440] blk_exit_queue+0x50/0x88 [ 2073.019443] blk_cleanup_queue+0x228/0x3d8 [ 2073.019451] null_del_dev+0xfc/0x1e0 [null_blk] [ 2073.019459] null_exit+0x90/0x114 [null_blk] [ 2073.019462] __arm64_sys_delete_module+0x358/0x5a0 [ 2073.019467] el0_svc_common+0xc8/0x320 [ 2073.019471] el0_svc_handler+0xf8/0x160 [ 2073.019474] el0_svc+0x10/0x218 [ 2073.019475] [ 2073.019479] La direcci\u00f3n con errores pertenece al objeto en ffff8000ccf63f00 que pertenece al cach\u00e9 kmalloc-1024 de tama\u00f1o 1024 [ 2073.019484] La direcci\u00f3n con errores se encuentra 552 bytes dentro de la regi\u00f3n de 1024 bytes [ffff8000ccf63f00, ffff8000ccf64300) [ 2073.019486] La direcci\u00f3n con errores pertenece a la p\u00e1gina: [ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 Compound_mapcount: 0 [ 2073.020123] flags: 0x7ffff0000008100(slab|head) [ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00 [ 2073.020409] ra ---truncado---"
}
],
"id": "CVE-2022-49179",
"lastModified": "2026-08-13T00:17:30.490",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2022-49179",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-27T17:59:03.662860Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-02-26T07:00:55.037",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/7507ead1e9d42957c2340f2c4a0e9d00034e3366"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/8410f70977734f21b8ed45c37e925d311dfda2e7"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/87fdfe8589d43e471dffb4c60f75eeb6f37afc4c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/8f34dea99cd7761156a146a5258a67d045d862f7"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/c01fced8d38fbccc82787065229578006f28e020"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/c4f5a678add58a8a0e7ee5e038496b376ea6d205"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-416"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-11-09T17:19:22+00:00",
"cve": "CVE-2022-49179",
"id": "CVE-2022-49179",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:fixed": "166",
"product_status:known_affected": "70",
"product_status:known_not_affected": "43",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: block, bfq: don\u0027t move oom_bfqq",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49179.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-49179",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-27T17:59:03.662860Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-02-27T17:59:04.947Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"block/bfq-cgroup.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "c4f5a678add58a8a0e7ee5e038496b376ea6d205",
"status": "affected",
"version": "0d52af590552473666da5b6111e7182d6cd23f92",
"versionType": "git"
},
{
"lessThan": "7507ead1e9d42957c2340f2c4a0e9d00034e3366",
"status": "affected",
"version": "0d52af590552473666da5b6111e7182d6cd23f92",
"versionType": "git"
},
{
"lessThan": "8f34dea99cd7761156a146a5258a67d045d862f7",
"status": "affected",
"version": "0d52af590552473666da5b6111e7182d6cd23f92",
"versionType": "git"
},
{
"lessThan": "87fdfe8589d43e471dffb4c60f75eeb6f37afc4c",
"status": "affected",
"version": "0d52af590552473666da5b6111e7182d6cd23f92",
"versionType": "git"
},
{
"lessThan": "c01fced8d38fbccc82787065229578006f28e020",
"status": "affected",
"version": "0d52af590552473666da5b6111e7182d6cd23f92",
"versionType": "git"
},
{
"lessThan": "8410f70977734f21b8ed45c37e925d311dfda2e7",
"status": "affected",
"version": "0d52af590552473666da5b6111e7182d6cd23f92",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"block/bfq-cgroup.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.16"
},
{
"lessThan": "4.16",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.189",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.110",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.33",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.16.*",
"status": "unaffected",
"version": "5.16.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.17.*",
"status": "unaffected",
"version": "5.17.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.189",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.110",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.33",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.16.19",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.17.2",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.18",
"versionStartIncluding": "4.16",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: don\u0027t move oom_bfqq\n\nOur test report a UAF:\n\n[ 2073.019181] ==================================================================\n[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584\n[ 2073.019192]\n[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5\n[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n[ 2073.019200] Call trace:\n[ 2073.019203] dump_backtrace+0x0/0x310\n[ 2073.019206] show_stack+0x28/0x38\n[ 2073.019210] dump_stack+0xec/0x15c\n[ 2073.019216] print_address_description+0x68/0x2d0\n[ 2073.019220] kasan_report+0x238/0x2f0\n[ 2073.019224] __asan_store8+0x88/0xb0\n[ 2073.019229] __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019233] bfq_put_async_queues+0xbc/0x208\n[ 2073.019236] bfq_pd_offline+0x178/0x238\n[ 2073.019240] blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019244] bfq_exit_queue+0x128/0x178\n[ 2073.019249] blk_mq_exit_sched+0x12c/0x160\n[ 2073.019252] elevator_exit+0xc8/0xd0\n[ 2073.019256] blk_exit_queue+0x50/0x88\n[ 2073.019259] blk_cleanup_queue+0x228/0x3d8\n[ 2073.019267] null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019274] null_exit+0x90/0x114 [null_blk]\n[ 2073.019278] __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019282] el0_svc_common+0xc8/0x320\n[ 2073.019287] el0_svc_handler+0xf8/0x160\n[ 2073.019290] el0_svc+0x10/0x218\n[ 2073.019291]\n[ 2073.019294] Allocated by task 14163:\n[ 2073.019301] kasan_kmalloc+0xe0/0x190\n[ 2073.019305] kmem_cache_alloc_node_trace+0x1cc/0x418\n[ 2073.019308] bfq_pd_alloc+0x54/0x118\n[ 2073.019313] blkcg_activate_policy+0x250/0x460\n[ 2073.019317] bfq_create_group_hierarchy+0x38/0x110\n[ 2073.019321] bfq_init_queue+0x6d0/0x948\n[ 2073.019325] blk_mq_init_sched+0x1d8/0x390\n[ 2073.019330] elevator_switch_mq+0x88/0x170\n[ 2073.019334] elevator_switch+0x140/0x270\n[ 2073.019338] elv_iosched_store+0x1a4/0x2a0\n[ 2073.019342] queue_attr_store+0x90/0xe0\n[ 2073.019348] sysfs_kf_write+0xa8/0xe8\n[ 2073.019351] kernfs_fop_write+0x1f8/0x378\n[ 2073.019359] __vfs_write+0xe0/0x360\n[ 2073.019363] vfs_write+0xf0/0x270\n[ 2073.019367] ksys_write+0xdc/0x1b8\n[ 2073.019371] __arm64_sys_write+0x50/0x60\n[ 2073.019375] el0_svc_common+0xc8/0x320\n[ 2073.019380] el0_svc_handler+0xf8/0x160\n[ 2073.019383] el0_svc+0x10/0x218\n[ 2073.019385]\n[ 2073.019387] Freed by task 72584:\n[ 2073.019391] __kasan_slab_free+0x120/0x228\n[ 2073.019394] kasan_slab_free+0x10/0x18\n[ 2073.019397] kfree+0x94/0x368\n[ 2073.019400] bfqg_put+0x64/0xb0\n[ 2073.019404] bfqg_and_blkg_put+0x90/0xb0\n[ 2073.019408] bfq_put_queue+0x220/0x228\n[ 2073.019413] __bfq_put_async_bfqq+0x98/0x168\n[ 2073.019416] bfq_put_async_queues+0xbc/0x208\n[ 2073.019420] bfq_pd_offline+0x178/0x238\n[ 2073.019424] blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019429] bfq_exit_queue+0x128/0x178\n[ 2073.019433] blk_mq_exit_sched+0x12c/0x160\n[ 2073.019437] elevator_exit+0xc8/0xd0\n[ 2073.019440] blk_exit_queue+0x50/0x88\n[ 2073.019443] blk_cleanup_queue+0x228/0x3d8\n[ 2073.019451] null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019459] null_exit+0x90/0x114 [null_blk]\n[ 2073.019462] __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019467] el0_svc_common+0xc8/0x320\n[ 2073.019471] el0_svc_handler+0xf8/0x160\n[ 2073.019474] el0_svc+0x10/0x218\n[ 2073.019475]\n[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00\n which belongs to the cache kmalloc-1024 of size 1024\n[ 2073.019484] The buggy address is located 552 bytes inside of\n 1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)\n[ 2073.019486] The buggy address belongs to the page:\n[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0\n[ 2073.020123] flags: 0x7ffff0000008100(slab|head)\n[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00\n[ 2073.020409] ra\n---truncated---"
}
],
"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"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable BFQ cgroup path is reached through local block I/O (read/write syscalls) and blkcg association changes on a BFQ-managed queue, not via network packet processing.\nAC:L - An attacker can induce the oom_bfqq fallback via memory pressure they control, then trigger bfq_bfqq_move through cgroup-associated I/O; BFQ with group scheduling is a common real-world configuration, not a rare dependency.\nPR:L - An unprivileged local user can submit I/O on BFQ devices and cause bios/tasks to span blkcgs (app cgroups, writeback, delegated/user scopes); CAP_SYS_ADMIN is not required to reach the buggy move path.\nUI:N - The attacker performs the I/O and cgroup-related actions themselves; no separate victim interaction is required.\nS:U - This is a kernel memory-corruption bug within the host kernel\u0027s authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - The bug is a use-after-free with a confirmed write to a freed bfq_group; UAF control of freed object contents enables arbitrary kernel memory disclosure.\nI:H - The KASAN report shows an 8-byte write to freed memory in __bfq_put_async_bfqq during group teardown, which is exploitable for heap corruption and control-flow hijacking.\nA:H - The use-after-free causes kernel oops/panic during elevator/device teardown and can crash the system even without a full exploit."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-12T23:58:15.467Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c4f5a678add58a8a0e7ee5e038496b376ea6d205"
},
{
"url": "https://git.kernel.org/stable/c/7507ead1e9d42957c2340f2c4a0e9d00034e3366"
},
{
"url": "https://git.kernel.org/stable/c/8f34dea99cd7761156a146a5258a67d045d862f7"
},
{
"url": "https://git.kernel.org/stable/c/87fdfe8589d43e471dffb4c60f75eeb6f37afc4c"
},
{
"url": "https://git.kernel.org/stable/c/c01fced8d38fbccc82787065229578006f28e020"
},
{
"url": "https://git.kernel.org/stable/c/8410f70977734f21b8ed45c37e925d311dfda2e7"
}
],
"title": "block, bfq: don\u0027t move oom_bfqq",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-49179",
"datePublished": "2025-02-26T01:55:32.100Z",
"dateReserved": "2025-02-26T01:49:39.281Z",
"dateUpdated": "2026-08-12T23:58:15.467Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.