SB20260528122 - Improper resource shutdown or release in Linux kernel gfs2

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-45961)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource shutdown or release in gfs2_fill_super() and gfs2_make_fs_rw() when transitioning a filesystem to read-write mode and handling error paths. A local user can trigger failures during this process to cause a denial of service.

The issue involves memory leaks of created kernel threads and an allocated quota bitmap buffer during specific failure conditions.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/da6f5bbc2e7902f578b503f2a4c3d8d09ca4b102
• https://git.kernel.org/stable/c/e54229ecf49add8451d5f765a32c86ab4446e06c