CVE-2026-53612: util-linux mount hook_owner TOCTOU allows local privilege escalation

Overview

Severity

High (CVSS 7)

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U

Exploit Status

Not Exploited

Patch Tuesday

2026-Oct

Released

2026-10-17

EPSS Score

0.11% (percentile: 1.5%)

Affected Products (1)

Other

• 0-17084

Revision History

• 2026-10-17: Information published.