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vuln-cve/data/2022/50xxx/CVE-2022-50563.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2022-50563",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-10-22T13:20:23.759Z",
"datePublished": "2025-10-22T13:23:22.080Z",
"dateUpdated": "2026-05-11T19:21:50.626Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T19:21:50.626Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm thin: Fix UAF in run_timer_softirq()\n\nWhen dm_resume() and dm_destroy() are concurrent, it will\nlead to UAF, as follows:\n\n BUG: KASAN: use-after-free in __run_timers+0x173/0x710\n Write of size 8 at addr ffff88816d9490f0 by task swapper/0/0\n<snip>\n Call Trace:\n <IRQ>\n dump_stack_lvl+0x73/0x9f\n print_report.cold+0x132/0xaa2\n _raw_spin_lock_irqsave+0xcd/0x160\n __run_timers+0x173/0x710\n kasan_report+0xad/0x110\n __run_timers+0x173/0x710\n __asan_store8+0x9c/0x140\n __run_timers+0x173/0x710\n call_timer_fn+0x310/0x310\n pvclock_clocksource_read+0xfa/0x250\n kvm_clock_read+0x2c/0x70\n kvm_clock_get_cycles+0xd/0x20\n ktime_get+0x5c/0x110\n lapic_next_event+0x38/0x50\n clockevents_program_event+0xf1/0x1e0\n run_timer_softirq+0x49/0x90\n __do_softirq+0x16e/0x62c\n __irq_exit_rcu+0x1fa/0x270\n irq_exit_rcu+0x12/0x20\n sysvec_apic_timer_interrupt+0x8e/0xc0\n\nOne of the concurrency UAF can be shown as below:\n\n use free\ndo_resume |\n __find_device_hash_cell |\n dm_get |\n atomic_inc(&md->holders) |\n | dm_destroy\n | __dm_destroy\n | if (!dm_suspended_md(md))\n | atomic_read(&md->holders)\n | msleep(1)\n dm_resume |\n __dm_resume |\n dm_table_resume_targets |\n pool_resume |\n do_waker #add delay work |\n dm_put |\n atomic_dec(&md->holders) |\n | dm_table_destroy\n | pool_dtr\n | __pool_dec\n | __pool_destroy\n | destroy_workqueue\n | kfree(pool) # free pool\n time out\n__do_softirq\n run_timer_softirq # pool has already been freed\n\nThis can be easily reproduced using:\n 1. create thin-pool\n 2. dmsetup suspend pool\n 3. dmsetup resume pool\n 4. dmsetup remove_all # Concurrent with 3\n\nThe root cause of this UAF bug is that dm_resume() adds timer after\ndm_destroy() skips cancelling the timer because of suspend status.\nAfter timeout, it will call run_timer_softirq(), however pool has\nalready been freed. The concurrency UAF bug will happen.\n\nTherefore, cancelling timer again in __pool_destroy()."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/md/dm-thin.c"
],
"versions": [
{
"version": "991d9fa02da0dd1f843dc011376965e0c8c6c9b5",
"lessThan": "7ee059d06a5d3c15465959e0472993e80fbe4e81",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "550a4fac7ecfee5bac6a0dd772456ca62fb72f46",
"status": "affected",
"versionType": "git"
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{
"version": "991d9fa02da0dd1f843dc011376965e0c8c6c9b5",
"lessThan": "e8b8e0d2bbf7d1172c4f435621418e29ee408d46",
"status": "affected",
"versionType": "git"
},
{
"version": "991d9fa02da0dd1f843dc011376965e0c8c6c9b5",
"lessThan": "7ae6aa649394e1e7f6dafb55ce0d578c0572a280",
"status": "affected",
"versionType": "git"
},
{
"version": "991d9fa02da0dd1f843dc011376965e0c8c6c9b5",
"lessThan": "34fe9c2251f19786a6689149a6212c6c0de1d63b",
"status": "affected",
"versionType": "git"
},
{
"version": "991d9fa02da0dd1f843dc011376965e0c8c6c9b5",
"lessThan": "34cd15d83b7206188d440b29b68084fcafde9395",
"status": "affected",
"versionType": "git"
},
{
"version": "991d9fa02da0dd1f843dc011376965e0c8c6c9b5",
"lessThan": "94e231c9d6f2648d2f1f68e7f476e050ee0a6159",
"status": "affected",
"versionType": "git"
},
{
"version": "991d9fa02da0dd1f843dc011376965e0c8c6c9b5",
"lessThan": "d9971fa4d8bde63d49c743c1b32d12fbbd3a30bd",
"status": "affected",
"versionType": "git"
},
{
"version": "991d9fa02da0dd1f843dc011376965e0c8c6c9b5",
"lessThan": "88430ebcbc0ec637b710b947738839848c20feff",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/md/dm-thin.c"
],
"versions": [
{
"version": "3.2",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.2",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.9.337",
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.14.303",
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.270",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.229",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.163",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.87",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.0.18",
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.4",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.2",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2",
"versionEndExcluding": "4.9.337"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2",
"versionEndExcluding": "4.14.303"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2",
"versionEndExcluding": "4.19.270"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2",
"versionEndExcluding": "5.4.229"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2",
"versionEndExcluding": "5.10.163"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2",
"versionEndExcluding": "5.15.87"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2",
"versionEndExcluding": "6.0.18"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2",
"versionEndExcluding": "6.1.4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2",
"versionEndExcluding": "6.2"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/7ee059d06a5d3c15465959e0472993e80fbe4e81"
},
{
"url": "https://git.kernel.org/stable/c/550a4fac7ecfee5bac6a0dd772456ca62fb72f46"
},
{
"url": "https://git.kernel.org/stable/c/e8b8e0d2bbf7d1172c4f435621418e29ee408d46"
},
{
"url": "https://git.kernel.org/stable/c/7ae6aa649394e1e7f6dafb55ce0d578c0572a280"
},
{
"url": "https://git.kernel.org/stable/c/34fe9c2251f19786a6689149a6212c6c0de1d63b"
},
{
"url": "https://git.kernel.org/stable/c/34cd15d83b7206188d440b29b68084fcafde9395"
},
{
"url": "https://git.kernel.org/stable/c/94e231c9d6f2648d2f1f68e7f476e050ee0a6159"
},
{
"url": "https://git.kernel.org/stable/c/d9971fa4d8bde63d49c743c1b32d12fbbd3a30bd"
},
{
"url": "https://git.kernel.org/stable/c/88430ebcbc0ec637b710b947738839848c20feff"
}
],
"title": "dm thin: Fix UAF in run_timer_softirq()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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