SUSE-SU-2026:21742-1: moderate: Security update for util-linux

[SLE-UPDATES]

# Security update for util-linux

Announcement ID: SUSE-SU-2026:21742-1  
Release Date: 2026-05-21T12:40:13Z  
Rating: moderate  
References:

  * bsc#1261606

  
Cross-References:

  * CVE-2026-27456

  
CVSS scores:

  * CVE-2026-27456 ( SUSE ):  4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-27456 ( NVD ):  4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

  
Affected Products:

  * SUSE Linux Micro 6.1

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for util-linux fixes the following issue

  * CVE-2026-27456: TOCTOU in the mount program when setting up loop devices
    (bsc#1261606).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Micro 6.1  
    zypper in -t patch SUSE-SLE-Micro-6.1-540=1

## Package List:

  * SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64)
    * liblastlog2-2-debuginfo-2.40.4-slfo.1.1_6.1
    * util-linux-debuginfo-2.40.4-slfo.1.1_6.1
    * libuuid1-debuginfo-2.40.4-slfo.1.1_6.1
    * libmount1-debuginfo-2.40.4-slfo.1.1_6.1
    * util-linux-2.40.4-slfo.1.1_6.1
    * libsmartcols1-debuginfo-2.40.4-slfo.1.1_6.1
    * libsmartcols1-2.40.4-slfo.1.1_6.1
    * util-linux-systemd-debuginfo-2.40.4-slfo.1.1_6.1
    * liblastlog2-2-2.40.4-slfo.1.1_6.1
    * lastlog2-2.40.4-slfo.1.1_6.1
    * libfdisk1-debuginfo-2.40.4-slfo.1.1_6.1
    * libuuid1-2.40.4-slfo.1.1_6.1
    * util-linux-systemd-debugsource-2.40.4-slfo.1.1_6.1
    * libblkid1-2.40.4-slfo.1.1_6.1
    * libmount1-2.40.4-slfo.1.1_6.1
    * libblkid1-debuginfo-2.40.4-slfo.1.1_6.1
    * util-linux-debugsource-2.40.4-slfo.1.1_6.1
    * util-linux-systemd-2.40.4-slfo.1.1_6.1
    * lastlog2-debuginfo-2.40.4-slfo.1.1_6.1
    * libfdisk1-2.40.4-slfo.1.1_6.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-27456.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1261606

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