CVE-2026-52930
kernel: ipc/shm: serialize orphan cleanup with shm_nattch updates
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 24, 2026
Updated · July 9, 2026
Description
A flaw was found in the Linux kernel's inter-process communication (IPC) shared memory (shm) component. A synchronization issue exists where orphaned shared memory segments might be incorrectly destroyed while still in use due to a lack of serialization between cleanup and attachment updates. This could lead to system instability or a denial of service.
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-367 · Time-of-check Time-of-use (TOCTOU) Race Condition