CVE-2026-99054
kernel: tipc: destroy topsrv workqueues before closing connections
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 31, 2026
Description
A flaw was found in the Linux kernel's TIPC (Transparent Inter-Process Communication) subsystem. A local user could exploit this flaw to cause a Denial of Service (DoS) or potential memory corruption. The vulnerability arises from a race condition during topology server shutdown, where connections are closed while background tasks are still processing. By triggering connection activity or subscription events during teardown, an attacker can cause a use-after-free condition or kernel lockup, resulting in a system crash.
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-366 · Race Condition within a Thread