CVE-2026-99103
kernel: workqueue: Fix unbound pool lifetime for pending pwqs
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 28, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's workqueue subsystem. A use-after-free vulnerability can occur when canceling inactive work items, as an internal worker pool structure is freed while still referenced on a pending queue. A local user could trigger this condition during workqueue operations, causing a kernel crash and resulting in a Denial of Service (DoS).
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-825 · Expired Pointer Dereference