CVE-2026-89518Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's `sched_ext` component. Under core scheduling, incorrect assumptions in dispatch kfuncs regarding `this_rq()` can lead to a deadlock. This occurs when an `rq` lock is acquired on a CPU different from t…
▾ 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%
— → 4.7
none → medium
Last analysed / modified upstream
— → 5.5
none → medium
A flaw was found in the Linux kernel's sched_ext component. Under core scheduling, incorrect assumptions in dispatch kfuncs regarding this_rq() can lead to a deadlock. This occurs when an rq lock is acquired on a CPU different from the dispatched rq's, potentially causing the system to become unresponsive. This vulnerability could result in a Denial of Service (DoS).
kernel: sched_ext: Fix this_rq() assumptions in dispatch kfuncs — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.
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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