CVE-2026-76642: util-linux libmount Privilege Escalation via Failed Mount Helper

Overview

Severity

High (CVSS 7.8)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-04

EPSS Score

0.18% (percentile: 7.2%)

Affected Products (1)

Other

• 21562-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-04: Information published.