CVE-2026-99058
kernel: workqueue: Fix NULL current_pwq deref in chained work check
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 27, 2026
Description
A flaw was found in the Linux kernel's workqueue subsystem. A local user can cause a Denial of Service (DoS) through a system crash by queueing work onto a workqueue that is being drained or destroyed. This issue occurs because the kernel fails to verify that a worker thread is actively executing work before evaluating chained tasks, resulting in a NULL pointer dereference.
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 · 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference