cgroup/cpuset: Make nr_deadline_tasks an atomic_t
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
CVE-2026-93150
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-93150
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
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"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": "d1b4262b78cc7638642833252ae92fc586854ffb",
"versionType": "git"
},
{
"status": "affected",
"version": "74fac5bb0d375d6b8f5e7997925063c509089c9c",
"versionType": "git"
},
{
"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": "6.1.50",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.4.13",
"lessThan": "6.5",
"versionType": "semver"
}
],
"programFiles": [
"kernel/cgroup/cpuset-internal.h",
"kernel/cgroup/cpuset.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.5"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.5",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/cgroup/cpuset-internal.h",
"kernel/cgroup/cpuset.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93150
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48719 · Revision 1
- Added to Heist Feed
- Publisher date