SUSE alert SUSE-SU-2026:21757-1 (libarchive)

From:
             
 
SLE-SECURITY-UPDATES <null@suse.de>
To:
             
 
sle-security-updates@lists.suse.com
Subject:
             
 
SUSE-SU-2026:21757-1: important: Security update for libarchive
Date:
             
 
Tue, 26 May 2026 20:31:49 -0000
Message-ID:
             
 
<177982750949.365.9925497143998493383@3e68a33e00aa>
# Security update for libarchive

Announcement ID: SUSE-SU-2026:21757-1  
Release Date: 2026-05-25T07:40:16Z  
Rating: important  
References:

  * bsc#1259635
  * bsc#1259928
  * bsc#1259931
  * bsc#1261186

  
Cross-References:

  * CVE-2026-4111
  * CVE-2026-4424
  * CVE-2026-4426
  * CVE-2026-5121

  
CVSS scores:

  * CVE-2026-4111 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-4111 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-4111 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-4424 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-4424 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-4424 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-4426 ( SUSE ):  8.3
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-4426 ( SUSE ):  8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
  * CVE-2026-4426 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  * CVE-2026-5121 ( SUSE ):  6.9
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-5121 ( SUSE ):  7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
  * CVE-2026-5121 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-5121 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

  
Affected Products:

  * SUSE Linux Micro 6.2

  
  
An update that solves four vulnerabilities can now be installed.

## Description:

This update for libarchive fixes the following issues

  * CVE-2026-4111: logical deadlock the RAR5 filter subsystem and the half-
    window output limiter leads to infinite loop and DoS (bsc#1259635).
  * CVE-2026-4424: 257-byte heap memory leak when processing a 170-byte RAR3
    (bsc#1259928).
  * CVE-2026-4426: undefined behavior due to unvalidated operand in shift
    expression of the zisofs decompression code (bsc#1259931).
  * CVE-2026-5121: missing validation check for pz_log2_bs can a heap buffer
    overflow write (bsc#1261186).

## 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 6.2  
    zypper in -t patch SUSE-SL-Micro-6.2-799=1

## Package List:

  * SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    * libarchive13-debuginfo-3.8.1-160000.3.1
    * libarchive13-3.8.1-160000.3.1
    * libarchive-debugsource-3.8.1-160000.3.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-4111.html
  * https://www.suse.com/security/cve/CVE-2026-4424.html
  * https://www.suse.com/security/cve/CVE-2026-4426.html
  * https://www.suse.com/security/cve/CVE-2026-5121.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1259635
  * https://bugzilla.suse.com/show_bug.cgi?id=1259928
  * https://bugzilla.suse.com/show_bug.cgi?id=1259931
  * https://bugzilla.suse.com/show_bug.cgi?id=1261186



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