SUSE-SU-2026:2381-1: important: Security update for libyang

[SLE-UPDATES]

# Security update for libyang

Announcement ID: SUSE-SU-2026:2381-1  
Release Date: 2026-06-12T06:50:59Z  
Rating: important  
References:

  * bsc#1265330

  
Cross-References:

  * CVE-2026-44673

  
CVSS scores:

  * CVE-2026-44673 ( SUSE ):  8.8
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-44673 ( SUSE ):  8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
  * CVE-2026-44673 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * openSUSE Leap 15.3
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server 15 SP4 LTSS
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for libyang fixes the following issue

  * CVE-2026-44673: integer overflow in `lyb_read_string()` of
    `src/parser_lyb.c` leads to heap buffer overflow when parsing a maliciously
    crafted LYB binary blob (bsc#1265330).

## 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:

  * openSUSE Leap 15.3  
    zypper in -t patch SUSE-2026-2381=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-2381=1

  * SUSE Linux Enterprise Server 15 SP4 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-2381=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP4  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-2381=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-2381=1

## Package List:

  * openSUSE Leap 15.3 (aarch64 ppc64le s390x x86_64 i586)
    * libyang-devel-1.0.184-150300.3.9.1
    * yang-tools-debuginfo-1.0.184-150300.3.9.1
    * yang-tools-1.0.184-150300.3.9.1
    * libyang-cpp-devel-1.0.184-150300.3.9.1
    * libyang-extentions-debuginfo-1.0.184-150300.3.9.1
    * libyang1-debuginfo-1.0.184-150300.3.9.1
    * python3-yang-1.0.184-150300.3.9.1
    * python3-yang-debuginfo-1.0.184-150300.3.9.1
    * libyang-debuginfo-1.0.184-150300.3.9.1
    * libyang-extentions-1.0.184-150300.3.9.1
    * libyang-cpp1-1.0.184-150300.3.9.1
    * libyang-cpp1-debuginfo-1.0.184-150300.3.9.1
    * libyang1-1.0.184-150300.3.9.1
    * libyang-debugsource-1.0.184-150300.3.9.1
  * openSUSE Leap 15.3 (noarch)
    * libyang-doc-1.0.184-150300.3.9.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64
    x86_64)
    * libyang-extentions-debuginfo-1.0.184-150300.3.9.1
    * libyang1-debuginfo-1.0.184-150300.3.9.1
    * libyang-debuginfo-1.0.184-150300.3.9.1
    * libyang-extentions-1.0.184-150300.3.9.1
    * libyang1-1.0.184-150300.3.9.1
    * libyang-debugsource-1.0.184-150300.3.9.1
  * SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
    * libyang-extentions-debuginfo-1.0.184-150300.3.9.1
    * libyang1-debuginfo-1.0.184-150300.3.9.1
    * libyang-debuginfo-1.0.184-150300.3.9.1
    * libyang-extentions-1.0.184-150300.3.9.1
    * libyang1-1.0.184-150300.3.9.1
    * libyang-debugsource-1.0.184-150300.3.9.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
    * libyang-extentions-debuginfo-1.0.184-150300.3.9.1
    * libyang1-debuginfo-1.0.184-150300.3.9.1
    * libyang-debuginfo-1.0.184-150300.3.9.1
    * libyang-extentions-1.0.184-150300.3.9.1
    * libyang1-1.0.184-150300.3.9.1
    * libyang-debugsource-1.0.184-150300.3.9.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64
    x86_64)
    * libyang-extentions-debuginfo-1.0.184-150300.3.9.1
    * libyang1-debuginfo-1.0.184-150300.3.9.1
    * libyang-debuginfo-1.0.184-150300.3.9.1
    * libyang-extentions-1.0.184-150300.3.9.1
    * libyang1-1.0.184-150300.3.9.1
    * libyang-debugsource-1.0.184-150300.3.9.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-44673.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1265330

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