CVE-2026-78408: Util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority

Overview

Severity

High (CVSS 7.9)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-07

Last Updated

2026-09-19

EPSS Score

0.19% (percentile: 7.8%)

Affected Products (1)

Other

• 21562-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-07: Information published.
• 2026-09-16: Information published.
• 2026-09-19: Information published.