{"id":"CVE-2026-93150","title":"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 tra…","summary":"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 tra…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 6c24849f5515e4966d94fa5279bdff4acf2e9489 < e422b32e6a57269ca8164c60674a78bee85cf5fb","Linux >= 6c24849f5515e4966d94fa5279bdff4acf2e9489 < e5965ae3f7c918151b87e5c925b7978afbeaf638","Linux >= 6c24849f5515e4966d94fa5279bdff4acf2e9489 < 78d9daf5e13ad1448b7dfebac949936710ec7565","Linux >= 6c24849f5515e4966d94fa5279bdff4acf2e9489 < 95220e1f18f6321008f021abc7d6f581f64bcb82","Linux 5ac05ce5684315d0e71194a63febaf33921c3268","Linux 43d8cbfefa7c59bd3b5fe184535eca476d45304e","Linux d1b4262b78cc7638642833252ae92fc586854ffb","Linux 74fac5bb0d375d6b8f5e7997925063c509089c9c","Linux >= 5.10.193 < 5.11","Linux >= 5.15.129 < 5.16","Linux >= 6.1.50 < 6.2","Linux >= 6.4.13 < 6.5","Linux 6.5"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:18:10.213","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93150","references":[{"url":"https://git.kernel.org/stable/c/78d9daf5e13ad1448b7dfebac949936710ec7565","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/95220e1f18f6321008f021abc7d6f581f64bcb82","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e422b32e6a57269ca8164c60674a78bee85cf5fb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e5965ae3f7c918151b87e5c925b7978afbeaf638","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.741Z","epss":0.002,"epssPercentile":0.10116,"slug":"CVE-2026-93150","body":"## Overview\n\nIn 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\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}