Missing Release of File Descriptor or Handle after Effective Lifetime Affecting util-linux package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-DEBIAN13-UTILLINUX-19513282
  • published3 Sept 2026
  • disclosed2 Sept 2026

Introduced: 2 Sep 2026

NewCVE-2026-78408  (opens in a new tab)
CWE-775  (opens in a new tab)

How to fix?

There is no fixed version for Debian:13 util-linux.

NVD Description

Note: Versions mentioned in the description apply only to the upstream util-linux package and not the util-linux package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve(). Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an attacker-controlled target can inherit root's ability to move host processes between cgroups. After a privileged operator uses --join-cgroup against that target, an unprivileged user can migrate and terminate unrelated root processes.

CVSS Base Scores

version 3.1