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Fedora 42: util-linux Critical Buffer Overflow CVE-2025

Fedora 42: util-linux Critical Buffer Overflow CVE-2025

Linuxsecurity •LinuxSecurity Advisories • December 21, 2025

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 : fix setpwnam() buffer use [CVE-2025-14104] libblkid: use snprintf() instead of sprintf()

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

fix setpwnam() buffer use [CVE-2025-14104] libblkid: use snprintf() instead of sprintf()

* Mon Dec 15 2025 Karel Zak - 2.40.4-8 - fix setpwnam() buffer use [CVE-2025-14104] - libblkid: use snprintf() instead of sprintf()

* Mon Dec 15 2025 Karel Zak - 2.40.4-8 - fix setpwnam() buffer use [CVE-2025-14104] - libblkid: use snprintf() instead of sprintf()

[ 1 ] Bug #2419370 - CVE-2025-14104 util-linux: util-linux: Heap buffer overread in setpwnam() when processing 256-byte usernames [fedora-42]

[ 1 ] Bug #2419370 - CVE-2025-14104 util-linux: util-linux: Heap buffer overread in setpwnam() when processing 256-byte usernames [fedora-42]

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-fc18ab1e37' at the command line. For more information, refer to the dnf documentation available at

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