CVE-2026-68421

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

Loading…

Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 10, 2026

Updated · October 30, 2026

Description

A flaw was found in the Linux kernel's sched_ext component. The put_prev_task_scx() function incorrectly issues a warning when a runnable task transitions to an idle state due to core scheduling. This occurs because the core scheduling mechanism bypasses certain checks, leading to a misleading warning.

Statement

This issue affects sched_ext (BPF scheduler). Spurious warning on core-sched forced idle in put_prev_task_scx(). Requires CONFIG_SCHED_CLASS_EXT.

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-1288 · Improper Validation of Consistency within Input