CVE-2026-89517Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's `sched_ext` component, which handles core scheduling. When multiple selections on the same core interleave due to a dropped lock, they can corrupt the scheduling state. This corruption can lead to a N…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 5.5
none → medium
— → 5.5
none → medium
— → 5.5
none → medium
Last analysed / modified upstream
A flaw was found in the Linux kernel's sched_ext component, which handles core scheduling. When multiple selections on the same core interleave due to a dropped lock, they can corrupt the scheduling state. This corruption can lead to a NULL dereference, tasks remaining active after being dequeued, system deadlocks, and ultimately cause the kernel to crash, resulting in a Denial of Service (DoS).
kernel: sched_ext: Fix rq->core_pick corruption under core scheduling — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.
Not affected:
Refer to the advisory for fix availability.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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