Description
In the Linux kernel, the following vulnerability has been resolved:
sched_ext: Don't warn on core-sched forced idle in put_prev_task_scx()
put_prev_task_scx() warns when a runnable task drops to a lower sched_class without SCX_OPS_ENQ_LAST, on the assumption that balance_one() would have kept it running. Core scheduling breaks that: a forced-idle SMT sibling reschedules through the core_pick fast path in pick_next_task(), which skips pick_task_scx() and thus balance_one(), so a runnable task can drop to idle with ENQ_LAST unset.
Gate the warning on sched_cpu_cookie_match(): a cookie mismatch means core scheduling forced the idle, while a match (or core scheduling off) still catches a genuine missing-ENQ_LAST drop.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 7c65ae81ea86a6ed8086e1a5651acd766187f19b, < 6267ebee9f2f3e26f4968bf6dc29d350620fa320; >= 7c65ae81ea86a6ed8086e1a5651acd766187f19b, < 2907e9d0f05b506dfd58aec589a23042a56ef36b; >= 7c65ae81ea86a6ed8086e1a5651acd766187f19b, < e2f188cdbf8312289532c36eb4e9eb1c9544d43a; >= 7c65ae81ea86a6ed8086e1a5651acd766187f19b, < b7d9c359e5cf867f7eb23df3bb1c6b9e58af24da |
| Linux | Linux | 6.12 |
References
Timeline
- Published
- Aug 10, 2026
- Last modified
- Oct 21, 2026
- NVD status
- Received