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CVE-2026-68421

sched_ext: Don't warn on core-sched forced idle in put_prev_task_scx()

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 7c65ae81ea86a6ed8086e1a5651acd766187f19b
Version < 2907e9d0f05b506dfd58aec589a23042a56ef36b
Status affected
Version 7c65ae81ea86a6ed8086e1a5651acd766187f19b
Version < e2f188cdbf8312289532c36eb4e9eb1c9544d43a
Status affected
Version 7c65ae81ea86a6ed8086e1a5651acd766187f19b
Version < b7d9c359e5cf867f7eb23df3bb1c6b9e58af24da
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.12
Status affected
Version 0
Version < 6.12
Status unaffected
Version <= 6.18.*
Version 6.18.42
Status unaffected
Version <= 7.1.*
Version 7.1.6
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.19% 0.091
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/2907e9d0f05b506dfd58aec589a23042a56ef36b
https://git.kernel.org/stable/c/e2f188cdbf8312289532c36eb4e9eb1c9544d43a
https://git.kernel.org/stable/c/b7d9c359e5cf867f7eb23df3bb1c6b9e58af24da