SUSE-SU-2026:21729-1: important: Security update for xz

[SLE-SECURITY-UPDATES]

# Security update for xz

Announcement ID: SUSE-SU-2026:21729-1  
Release Date: 2026-05-21T12:03:45Z  
Rating: important  
References:

  * bsc#1261280

  
Cross-References:

  * CVE-2026-34743

  
CVSS scores:

  * CVE-2026-34743 ( SUSE ):  7.5
    CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-34743 ( SUSE ):  7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-34743 ( NVD ):  1.7
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-34743 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

  
Affected Products:

  * SUSE Linux Micro 6.0

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for xz fixes the following issue

  * CVE-2026-34743: buffer overflow in lzma_index_append() (bsc#1261280).

## 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 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-723=1

## Package List:

  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * liblzma5-debuginfo-5.4.3-6.1
    * xz-5.4.3-6.1
    * xz-debuginfo-5.4.3-6.1
    * xz-debugsource-5.4.3-6.1
    * liblzma5-5.4.3-6.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-34743.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1261280

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