🛡️ CVE-2026-68421 — kernel

⚪ Unknown ✅ No Known Exploit NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Affected software

CVE-2026-68421 is recorded against 2 packages.

  • kernel (from 6.19.0 up to 7.1.6)
  • unknown

Timeline and source

Published on 10 August 2026 and last revised on 11 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

git.kernel.org (Package)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-08-10
Updated 2026-08-12
Modified 2026-08-11
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel 6.19.0 7.1.6
unknown — —

Similar Threats

Free Vulnerability Check

Is your site affected by CVE-2026-68421?

BotEraser helps you identify potentially vulnerable plugins and themes by checking your installation against CVE-2026-68421 and other known CVE records.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

Browse related advisories

All advisoriesCVECVE 2026