CVE-2026-93150

CVE CVE-2026-93150EUVD EUVD-2026-82258Published 2026-09-17T16:11:46.000Z

What the advisory describes

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

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 43d8cbfefa7c59bd3b5fe184535eca476d45304e; 5.15.129 <5.16; 6c24849f5515e4966d94fa5279bdff4acf2e9489 <e5965ae3f7c918151b87e5c925b7978afbeaf638; 6c24849f5515e4966d94fa5279bdff4acf2e9489 <95220e1f18f6321008f021abc7d6f581f64bcb82; patch: 6.18.52; patch: 7.2.6; 6c24849f5515e4966d94fa5279bdff4acf2e9489 <78d9daf5e13ad1448b7dfebac949936710ec7565; 6.4.13 <6.5; 74fac5bb0d375d6b8f5e7997925063c509089c9c; patch: 0; patch: 7.3-rc1; 6.5; patch: 6.12.110; 5ac05ce5684315d0e71194a63febaf33921c3268; d1b4262b78cc7638642833252ae92fc586854ffb; 6c24849f5515e4966d94fa5279bdff4acf2e9489 <e422b32e6a57269ca8164c60674a78bee85cf5fb; 6.1.50 <6.2; 5.10.193 <5.11

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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