SUSE alert openSUSE-SU-2026:20797-1 (libarchive)

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openSUSE-SU-2026:20797-1: important: Security update for libarchive
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Wed, 27 May 2026 17:51:18 +0200
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<20260527155118.A0793FCE4@maintenance.suse.de>
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Article
openSUSE security update: security update for libarchive
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:20797-1
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 ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * 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-2026-4424 ( 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 ( 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-2026-4426 ( 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 ( 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-2026-5121 ( 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 ( 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

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 4 vulnerabilities and has 4 bug fixes 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 openSUSE security update use the suse recommended installation methods
   like YaST online_update or "zypper patch".
   Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

   zypper in -t patch openSUSE-Leap-16.0-799=1

Package List:

- openSUSE Leap 16.0:

  bsdtar-3.8.1-160000.3.1
  libarchive-devel-3.8.1-160000.3.1
  libarchive13-3.8.1-160000.3.1

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