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Fedora 43 util-linux Critical Libmount TOCTOU SUID Fix 2026-a7ff7017ee

fedora
Calendar Grey June 26, 2026
Dist Fedora Esm H88
Upgrade util-linux 2.41.5 for Fedora 43 addresses critical libmount security issues, including TOCTOU attacks.
upstream upgrade with security fixes: CVE-2026-53612 - libmount: TOCTOU attack via ancestor directory swap during mount CVE-2026-53613 - libmount: SUID bypass via LIBMOUNT_FORCE_MO...

Summary

The util-linux package contains a large variety of low-level system

utilities that are necessary for a Linux system to function. Among

others, util-linux contains the fdisk configuration tool and the login

program.

Update Information:

upstream upgrade with security fixes: CVE-2026-53612 - libmount: TOCTOU attack via ancestor directory swap during mount CVE-2026-53613 - libmount: SUID bypass via LIBMOUNT_FORCE_MOUNT2 and legacy mount path CVE-2026-53614 - libmount: fd_target TOCTOU prevention

Topics%20covered

Topics Covered

security advisory fedora critical TOCTOU libmount suid by-pass

Change Log

* Tue Jun 16 2026 Karel Zak - 2.41.5-1 - upgrade to upstream release v2.41.5

References

Fedora Update Notification FEDORA-2026-a7ff7017ee 2026-06-27 00:54:50.049635+00:00 Name : util-linux Product : Fedora 43 Version : 2.41.5 Release : 1.fc43 URL : https://en.wikipedia.org/wiki/Util-linux Summary : Collection of basic system utilities Description : The util-linux package contains a large variety of low-level system utilities that are necessary for a Linux system to function. Among others, util-linux contains the fdisk configuration tool and the login program.

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-a7ff7017ee' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
critical
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Critical

Name: util-linux
Product: Fedora 43
Version: 2.41.5
Release: 1.fc43
URL: https://en.wikipedia.org/wiki/Util-linux
Summary: Collection of basic system utilities

Topics%20covered

Topics Covered

security advisory fedora critical TOCTOU libmount suid by-pass

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