CVE-2026-53614

Publication date 18 June 2026

Last updated 28 October 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.0 · High

Score breakdown

Description

util-linux is a random collection of Linux utilities. In util-linux 2.39.1 through 2.41.4 and 2.42 through 2.42.1, the SUID `mount` utility reads the attacker-controlled `LIBMOUNT_FORCE_MOUNT2` environment variable with `getenv()`, allowing a local low-privileged user to force the non-atomic legacy bind-mount path. With an `/etc/fstab` bind mount authorized by `user` or `users` and protected by `nosuid`, `noexec`, or `nodev`, an attacker can race the window between the initial bind mount and the remount that applies those security flags and execute a SUID program from the temporarily unprotected mount, potentially gaining root privileges. This issue is fixed in 2.41.5 and 2.42.2.

Read the notes from the security team

Status

Package Ubuntu Release Status
util-linux 26.10 stonking
Vulnerable work in progress in 2.42.2-1ubuntu1
26.04 LTS resolute
Fixed in 2.41.3-3ubuntu2.2
25.10 questing Ignored end of life, was needs-triage
24.04 LTS noble
Fixed in 2.39.3-9ubuntu6.6
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes

mdeslaur

introduced in 2.39.1

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
util-linux

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.0 · High

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

References

Related Ubuntu Security Notices (USN)

    • USN-8702-1
    • util-linux vulnerabilities
    • 31 August 2026

Other references

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