Описание
Security update for util-linux
This update for util-linux fixes the following issues:
- CVE-2026-13595: heap use-after-free read in
libblkidnested partition probing (bsc#1269583). - CVE-2026-27456: TOCTOU race condition in the mount program when setting up loop devices (bsc#1261606).
- Several security issues in releases prior to v2.42.2 and v2.41.5 (bsc#1268886).
Список пакетов
Container suse/ltss/sle15.5/sle15:latest
Container suse/sle-micro/5.5/toolbox:latest
Container suse/sle-micro/5.5:latest
Container suse/sle-micro/base-5.5:latest
Container suse/sle-micro/kvm-5.5:latest
Container suse/sle-micro/rt-5.5:latest
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
SUSE Linux Enterprise Micro 5.5
SUSE Linux Enterprise Server 15 SP5-LTSS
SUSE Linux Enterprise Server for SAP Applications 15 SP5
Ссылки
- Link for SUSE-SU-2026:3813-1
- E-Mail link for SUSE-SU-2026:3813-1
- SUSE Security Ratings
- SUSE Bug 1261606
- SUSE Bug 1268886
- SUSE Bug 1269583
- SUSE CVE CVE-2026-13595 page
- SUSE CVE CVE-2026-27456 page
- SUSE CVE CVE-2026-53613 page
Описание
A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug events. This could lead to limited information disclosure or denial of service.
Затронутые продукты
Ссылки
- CVE-2026-13595
- SUSE Bug 1269583
Описание
util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check-Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither O_NOFOLLOW, nor inode comparison, nor post-open fstat() are employed. This allows a local unprivileged user to replace the source file with a symlink pointing to any root-owned file or device during the race window, causing the SUID binary to open and mount it as root. Exploitation requires an /etc/fstab entry with user,loop options whose path points to a directory where the attacker has write permission, and that /usr/bin/mount has the SUID bit set (the default configuration on virtually all Linux distributions). The impact is unauthorized read access to root-protected files and block devices, including backup images, disk volumes, and any file containing a valid filesystem. This issue has been patched in version 2.41.4.
Затронутые продукты
Ссылки
- CVE-2026-27456
- SUSE Bug 1261606
- SUSE Bug 1268886
Описание
unknown
Затронутые продукты
Ссылки
- CVE-2026-53613
- SUSE Bug 1268886