CVE-2026-89519

kernel: sched_ext: Replace SCX_RQ_BAL_KEEP with a dispatch verdict return

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 11, 2026

Updated · September 29, 2026

Description

A flaw was found in the Linux kernel's sched_ext component. Due to a logical error where a stale flag (SCX_RQ_BAL_KEEP) could be consumed, the scheduler might incorrectly keep a task running even after it has been dequeued. This could lead to unexpected task management behavior within the kernel.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition