FKIE_CVE-2025-68336
Vulnerability from fkie_nvd - Published: 2025-12-22 17:16 - Updated: 2026-10-19 21:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
locking/spinlock/debug: Fix data-race in do_raw_write_lock
KCSAN reports:
BUG: KCSAN: data-race in do_raw_write_lock / do_raw_write_lock
write (marked) to 0xffff800009cf504c of 4 bytes by task 1102 on cpu 1:
do_raw_write_lock+0x120/0x204
_raw_write_lock_irq
do_exit
call_usermodehelper_exec_async
ret_from_fork
read to 0xffff800009cf504c of 4 bytes by task 1103 on cpu 0:
do_raw_write_lock+0x88/0x204
_raw_write_lock_irq
do_exit
call_usermodehelper_exec_async
ret_from_fork
value changed: 0xffffffff -> 0x00000001
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1103 Comm: kworker/u4:1 6.1.111
Commit 1a365e822372 ("locking/spinlock/debug: Fix various data races") has
adressed most of these races, but seems to be not consistent/not complete.
>From do_raw_write_lock() only debug_write_lock_after() part has been
converted to WRITE_ONCE(), but not debug_write_lock_before() part.
Do it now.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"kernel/locking/spinlock_debug.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "8e5b2cf10844402054b52b489b525dc30cc16908",
"status": "affected",
"version": "1a365e822372ba24c9da0822bc583894f6f3d821",
"versionType": "git"
},
{
"lessThan": "c228cb699a07a5f2d596d186bc5c314c99bb8bbf",
"status": "affected",
"version": "1a365e822372ba24c9da0822bc583894f6f3d821",
"versionType": "git"
},
{
"lessThan": "93bd23524d63deb80fb85beb2e43fafeb1043d0f",
"status": "affected",
"version": "1a365e822372ba24c9da0822bc583894f6f3d821",
"versionType": "git"
},
{
"lessThan": "39d2ef113416f1a4205b03fb0aa2e428d1412c77",
"status": "affected",
"version": "1a365e822372ba24c9da0822bc583894f6f3d821",
"versionType": "git"
},
{
"lessThan": "b163a5e8c703201c905d6ec7920ed79d167e8442",
"status": "affected",
"version": "1a365e822372ba24c9da0822bc583894f6f3d821",
"versionType": "git"
},
{
"lessThan": "16b3590c0e1e615757dade098c8fbc0d4f040c76",
"status": "affected",
"version": "1a365e822372ba24c9da0822bc583894f6f3d821",
"versionType": "git"
},
{
"lessThan": "396a9270a7b90886be501611b13aa636f2e8c703",
"status": "affected",
"version": "1a365e822372ba24c9da0822bc583894f6f3d821",
"versionType": "git"
},
{
"lessThan": "c14ecb555c3ee80eeb030a4e46d00e679537f03a",
"status": "affected",
"version": "1a365e822372ba24c9da0822bc583894f6f3d821",
"versionType": "git"
},
{
"status": "affected",
"version": "3106fb78d3579c8e9c9b3040f7f7841981919624",
"versionType": "git"
},
{
"status": "affected",
"version": "c0911024ff927ba5c4786b507004cb615be1d776",
"versionType": "git"
},
{
"status": "affected",
"version": "09226e5c38639437565af01e6009a9286a351d04",
"versionType": "git"
},
{
"status": "affected",
"version": "c7673f01604fa722b9d7c1e29e17cec1b8ae09c5",
"versionType": "git"
},
{
"status": "affected",
"version": "c120c3dbeb76305235c8e557f84d9e2d7d0f5933",
"versionType": "git"
},
{
"lessThan": "4.5",
"status": "affected",
"version": "4.4.209",
"versionType": "semver"
},
{
"lessThan": "4.10",
"status": "affected",
"version": "4.9.209",
"versionType": "semver"
},
{
"lessThan": "4.15",
"status": "affected",
"version": "4.14.164",
"versionType": "semver"
},
{
"lessThan": "4.20",
"status": "affected",
"version": "4.19.95",
"versionType": "semver"
},
{
"lessThan": "5.5",
"status": "affected",
"version": "5.4.11",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"kernel/locking/spinlock_debug.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.5"
},
{
"lessThan": "5.5",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.198",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.160",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.62",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.12",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.1",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlocking/spinlock/debug: Fix data-race in do_raw_write_lock\n\nKCSAN reports:\n\nBUG: KCSAN: data-race in do_raw_write_lock / do_raw_write_lock\n\nwrite (marked) to 0xffff800009cf504c of 4 bytes by task 1102 on cpu 1:\n do_raw_write_lock+0x120/0x204\n _raw_write_lock_irq\n do_exit\n call_usermodehelper_exec_async\n ret_from_fork\n\nread to 0xffff800009cf504c of 4 bytes by task 1103 on cpu 0:\n do_raw_write_lock+0x88/0x204\n _raw_write_lock_irq\n do_exit\n call_usermodehelper_exec_async\n ret_from_fork\n\nvalue changed: 0xffffffff -\u003e 0x00000001\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 1103 Comm: kworker/u4:1 6.1.111\n\nCommit 1a365e822372 (\"locking/spinlock/debug: Fix various data races\") has\nadressed most of these races, but seems to be not consistent/not complete.\n\n\u003eFrom do_raw_write_lock() only debug_write_lock_after() part has been\nconverted to WRITE_ONCE(), but not debug_write_lock_before() part.\nDo it now."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha corregido la siguiente vulnerabilidad:\\n\\nlocking/spinlock/debug: Fix data-race in do_raw_write_lock\\n\\nInformes de KCSAN:\\n\\nBUG: KCSAN: data-race in do_raw_write_lock / do_raw_write_lock\\n\\nwrite (marked) to 0xffff800009cf504c of 4 bytes by task 1102 on cpu 1:\\n do_raw_write_lock+0x120/0x204\\n _raw_write_lock_irq\\n do_exit\\n call_usermodehelper_exec_async\\n ret_from_fork\\n\\nread to 0xffff800009cf504c of 4 bytes by task 1103 on cpu 0:\\n do_raw_write_lock+0x88/0x204\\n _raw_write_lock_irq\\n do_exit\\n call_usermodehelper_exec_async\\n ret_from_fork\\n\\nvalue changed: 0xffffffff -mayor que 0x00000001\\n\\nReportado por Kernel Concurrency Sanitizer el:\\nCPU: 0 PID: 1103 Comm: kworker/u4:1 6.1.111\\n\\nEl commit 1a365e822372 (\\\u201clocking/spinlock/debug: Fix various data races\\\u201d) ha abordado la mayor parte de estas carreras, pero parece no ser consistente/no estar completo.\\n\\n\u003eDesde do_raw_write_lock() solo la parte debug_write_lock_after() se ha\\nconvertido a WRITE_ONCE(), pero la parte debug_write_lock_before() no.\\nHazlo ahora."
}
],
"id": "CVE-2025-68336",
"lastModified": "2026-10-19T21:10:00.160",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-68336",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-16T15:04:42.942439Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-12-22T17:16:01.357",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/16b3590c0e1e615757dade098c8fbc0d4f040c76"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/396a9270a7b90886be501611b13aa636f2e8c703"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/39d2ef113416f1a4205b03fb0aa2e428d1412c77"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/8e5b2cf10844402054b52b489b525dc30cc16908"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/93bd23524d63deb80fb85beb2e43fafeb1043d0f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b163a5e8c703201c905d6ec7920ed79d167e8442"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c14ecb555c3ee80eeb030a4e46d00e679537f03a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c228cb699a07a5f2d596d186bc5c314c99bb8bbf"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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