CVE-2026-93150
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: cgroup/cpuset: Make nr_deadline_tasks an atomic_t The nr_deadline_tasks variable in the cpuset structure was introduced by commit 6c24849f5515 ("sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets"). It is reported by sashiko [1] that nr_deadline_tasks can currently be modified by inc_dl_tasks_cs() under rq->lock and by cpuset_attach() under cpuset_mutex. So if both updates happen simultaneously, the nr_deadline_tasks variable can be corrupted leading to incorrect operations down the road. Fix that by changing its type to atomic_t so that nr_deadline_tasks are always atomically updated. This fix patch is a low hanging fruit. It can handle some of the races between a concurrent sched_setscheduler() and cpuset_can_attach()/cpuset_attach() calls, but not all of them like the other issue raised by sashiko [2]. This will be handled hopefully in a future follow up patch. [1] https://sashiko.dev/#/patchset/20260626181923.133658-1-longman%40redhat.com [2] https://sashiko.dev/#/patchset/20260630033344.352702-1-longman%40redhat.com
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-17 17:18:10.213000
Last modified
2026-10-30 13:20:58.420000
View original CVE JSON
{
"id": "CVE-2026-93150",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-17T17:18:10.213",
"lastModified": "2026-10-30T13:20:58.420",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncgroup/cpuset: Make nr_deadline_tasks an atomic_t\n\nThe nr_deadline_tasks variable in the cpuset structure was introduced by\ncommit 6c24849f5515 (\"sched/cpuset: Keep track of SCHED_DEADLINE task\nin cpusets\"). It is reported by sashiko [1] that nr_deadline_tasks\ncan currently be modified by inc_dl_tasks_cs() under rq->lock and\nby cpuset_attach() under cpuset_mutex. So if both updates happen\nsimultaneously, the nr_deadline_tasks variable can be corrupted leading\nto incorrect operations down the road.\n\nFix that by changing its type to atomic_t so that nr_deadline_tasks\nare always atomically updated. This fix patch is a low hanging fruit.\nIt can handle some of the races between a concurrent sched_setscheduler()\nand cpuset_can_attach()/cpuset_attach() calls, but not all of them like\nthe other issue raised by sashiko [2]. This will be handled hopefully\nin a future follow up patch.\n\n[1] https://sashiko.dev/#/patchset/20260626181923.133658-1-longman%40redhat.com\n[2] https://sashiko.dev/#/patchset/20260630033344.352702-1-longman%40redhat.com"
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"kernel/cgroup/cpuset-internal.h",
"kernel/cgroup/cpuset.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "d1b4262b78cc7638642833252ae92fc586854ffb",
"lessThan": "4987d336abf3fa575a2d953f69e11154ac9802c3",
"versionType": "git",
"status": "affected"
},
{
"version": "6c24849f5515e4966d94fa5279bdff4acf2e9489",
"lessThan": "642648fa7595241e4d491add5007bc33f11defb5",
"versionType": "git",
"status": "affected"
},
{
"version": "6c24849f5515e4966d94fa5279bdff4acf2e9489",
"lessThan": "e422b32e6a57269ca8164c60674a78bee85cf5fb",
"versionType": "git",
"status": "affected"
},
{
"version": "6c24849f5515e4966d94fa5279bdff4acf2e9489",
"lessThan": "e5965ae3f7c918151b87e5c925b7978afbeaf638",
"versionType": "git",
"status": "affected"
},
{
"version": "6c24849f5515e4966d94fa5279bdff4acf2e9489",
"lessThan": "78d9daf5e13ad1448b7dfebac949936710ec7565",
"versionType": "git",
"status": "affected"
},
{
"version": "6c24849f5515e4966d94fa5279bdff4acf2e9489",
"lessThan": "95220e1f18f6321008f021abc7d6f581f64bcb82",
"versionType": "git",
"status": "affected"
},
{
"version": "5ac05ce5684315d0e71194a63febaf33921c3268",
"versionType": "git",
"status": "affected"
},
{
"version": "43d8cbfefa7c59bd3b5fe184535eca476d45304e",
"versionType": "git",
"status": "affected"
},
{
"version": "74fac5bb0d375d6b8f5e7997925063c509089c9c",
"versionType": "git",
"status": "affected"
},
{
"version": "6.1.50",
"lessThan": "6.1.191",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.10.193",
"lessThan": "5.11",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.15.129",
"lessThan": "5.16",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.4.13",
"lessThan": "6.5",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"kernel/cgroup/cpuset-internal.h",
"kernel/cgroup/cpuset.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.5",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.5",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.110",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.52",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.6",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/4987d336abf3fa575a2d953f69e11154ac9802c3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/642648fa7595241e4d491add5007bc33f11defb5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/78d9daf5e13ad1448b7dfebac949936710ec7565",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/95220e1f18f6321008f021abc7d6f581f64bcb82",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e422b32e6a57269ca8164c60674a78bee85cf5fb",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e5965ae3f7c918151b87e5c925b7978afbeaf638",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}