CVE-2023-54128: Linux

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: fs: drop peer group ids under namespace lock When cleaning up peer group ids in the failure path we need to make sure to hold on to the namespace lock. Otherwise another thread might just turn the mount from a shared into a non-shared mount concurrently.

Affected products

• Linux Linux: from 5.12, before 5.15.107 (fixed in 5.15.107); from 5.16, before 6.1.24 (fixed in 6.1.24); from 6.2, before 6.2.11 (fixed in 6.2.11)

Published 2025-12-24. Last modified 2026-08-04.