CVE-2026-93150

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

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/78d9daf5e13ad1448b7dfebac949936710ec7565
https://git.kernel.org/stable/c/95220e1f18f6321008f021abc7d6f581f64bcb82
https://git.kernel.org/stable/c/e422b32e6a57269ca8164c60674a78bee85cf5fb
https://git.kernel.org/stable/c/e5965ae3f7c918151b87e5c925b7978afbeaf638

Configurations

No configuration.

History

17 Sep 2026, 17:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 17:18

Updated : 2026-09-17 17:18

NVD link : CVE-2026-93150

Mitre link : CVE-2026-93150

CVE.ORG link : CVE-2026-93150

JSON object : View

Products Affected

No product.

CWE

No CWE.

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