CVE-2026-99172
kernel: ipc: drop the mqueue mount with kern_unmount() on setup failure
Severity
LowRed 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 inter-process communication (IPC) subsystem. When initialization of an IPC namespace fails during setup, internal message queue mounts are not properly released, causing kernel memory and resources to leak. A local user could exploit this flaw by repeatedly triggering namespace creation failures, leading to system resource exhaustion and 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 · 2.5CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE-772 · Missing Release of Resource after Effective Lifetime