SUSE-SU-2026:20051-1: moderate: Security update for libtasn1

[SLE-UPDATES]

# Security update for libtasn1

Announcement ID: SUSE-SU-2026:20051-1  
Release Date: 2026-01-12T12:00:25Z  
Rating: moderate  
References:

  * bsc#1256341

  
Cross-References:

  * CVE-2025-13151

  
CVSS scores:

  * CVE-2025-13151 ( SUSE ):  6.9
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-13151 ( SUSE ):  6.6 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
  * CVE-2025-13151 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Micro 6.0

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for libtasn1 fixes the following issues:

  * CVE-2025-13151: lack of validation of input data size leads to stack-based
    buffer overflow in `asn1_expend_octet_string` (bsc#1256341).

## 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-6.0-558=1

## Package List:

  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * libtasn1-6-4.19.0-5.1
    * libtasn1-6-debuginfo-4.19.0-5.1
    * libtasn1-debugsource-4.19.0-5.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-13151.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1256341

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