SUSE-SU-2026:23621-1: moderate: Security update for libidn

[SLE-SECURITY-UPDATES]

# Security update for libidn

Announcement ID: SUSE-SU-2026:23621-1  
Release Date: 2026-09-04T07:30:15Z  
Rating: moderate  
References:

  * bsc#1268965

  
Cross-References:

  * CVE-2026-57053

  
CVSS scores:

  * CVE-2026-57053 ( SUSE ):  2.1
    CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-57053 ( SUSE ):  4.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
  * CVE-2026-57053 ( NVD ):  4.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
  * CVE-2026-57053 ( NVD ):  2.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for libidn fixes the following issue:

  * CVE-2026-57053: out-of-bounds read in `ToUnicode` APIs (bsc#1268965).

## 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 Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1606

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-1606

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * libidn-tools-1.43-160000.3.1
    * libidn12-1.43-160000.3.1
    * libidn-tools-debuginfo-1.43-160000.3.1
    * libidn12-debuginfo-1.43-160000.3.1
    * libidn-devel-1.43-160000.3.1
    * libidn-debugsource-1.43-160000.3.1
  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * libidn-tools-1.43-160000.3.1
    * libidn12-1.43-160000.3.1
    * libidn-tools-debuginfo-1.43-160000.3.1
    * libidn12-debuginfo-1.43-160000.3.1
    * libidn-devel-1.43-160000.3.1
    * libidn-debugsource-1.43-160000.3.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-57053.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1268965

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