Improper Validation of Consistency within Input The advisory has been revoked - it doesn't affect any version of package libperf (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-LIBPERF-18639725
- published12 Aug 2026
- disclosed10 Aug 2026
Introduced: 10 Aug 2026
CVE-2026-68421 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libperf package and not the libperf package as distributed by RHEL.
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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2513236
- https://access.redhat.com/security/cve/CVE-2026-68421
- https://git.kernel.org/stable/c/2907e9d0f05b506dfd58aec589a23042a56ef36b
- https://git.kernel.org/stable/c/b7d9c359e5cf867f7eb23df3bb1c6b9e58af24da
- https://git.kernel.org/stable/c/e2f188cdbf8312289532c36eb4e9eb1c9544d43a
- https://git.kernel.org/stable/c/6267ebee9f2f3e26f4968bf6dc29d350620fa320