CVE-2025-68336
Full vulnerability record from the local CVENow database.
Description
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.
Severity
HIGH
CVSS score
7.5
(v3.1)
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-12-22 17:16:01.357000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
{
"id": "CVE-2025-68336",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-12-22T17:16:01.357",
"lastModified": "2026-10-19T21:10:00.160",
"vulnStatus": "Deferred",
"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 -> 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>From 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 (\\“locking/spinlock/debug: Fix various data races\\”) ha abordado la mayor parte de estas carreras, pero parece no ser consistente/no estar completo.\\n\\n>Desde 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."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"kernel/locking/spinlock_debug.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
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"lessThan": "8e5b2cf10844402054b52b489b525dc30cc16908",
"versionType": "git",
"status": "affected"
},
{
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{
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{
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{
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{
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"versionType": "git",
"status": "affected"
},
{
"version": "c120c3dbeb76305235c8e557f84d9e2d7d0f5933",
"versionType": "git",
"status": "affected"
},
{
"version": "4.4.209",
"lessThan": "4.5",
"versionType": "semver",
"status": "affected"
},
{
"version": "4.9.209",
"lessThan": "4.10",
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"status": "affected"
},
{
"version": "4.14.164",
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"versionType": "semver",
"status": "affected"
},
{
"version": "4.19.95",
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"status": "affected"
},
{
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}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"kernel/locking/spinlock_debug.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
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"status": "affected"
},
{
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"versionType": "semver",
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},
{
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},
{
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected"
},
{
"version": "6.1.160",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
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"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.62",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.17.12",
"lessThanOrEqual": "6.17.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.1",
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"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.19",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-16T15:04:42.942439Z",
"id": "CVE-2025-68336",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/16b3590c0e1e615757dade098c8fbc0d4f040c76",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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{
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}