CVE-2026-89516
kernel: sched_ext: Don't BUG_ON a destroyed DSQ in process_deferred_reenq_users
Severity
ModerateRed Hat Product Security
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. When a Deferred Scheduling Queue (DSQ) is destroyed, a pending deferred re-enqueue (DRU) operation might still attempt to access the destroyed DSQ. This can lead to a BUG_ON condition, causing a kernel panic and resulting in a Denial of Service (DoS) for the system.
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-825 · Expired Pointer Dereference