Upstream information

CVE-2026-44673 at MITRE

Description

libyang is a YANG data modeling language library. Prior to SO 5.2.15, lyb_read_string() in src/parser_lyb.c contains an integer overflow that results in a heap buffer overflow when parsing a maliciously crafted LYB binary blob. An attacker who can supply LYB data to any libyang consumer (NETCONF server, sysrepo, etc.) can trigger a crash or potential heap corruption. This vulnerability is fixed in SO 5.2.15.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (GitHub) SUSE
Base Score 7.5 8.6
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None Low
Integrity Impact None Low
Availability Impact High High
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail SUSE
Base Score 8.8
Vector 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
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality Impact Low
Vulnerable System Integrity Impact Low
Vulnerable System Availability Impact High
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1265330 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Liberty Linux 10
  • libyang >= 2.1.148-4.el10_2
  • libyang-devel >= 2.1.148-4.el10_2
  • libyang-devel-doc >= 2.1.148-4.el10_2
 Patchnames:
RHSA-2026:24758
SUSE Liberty Linux 8
  • libyang >= 1.0.184-2.el8_10
 Patchnames:
RHSA-2026:24545
SUSE Liberty Linux 9
  • libyang >= 2.1.148-1.el9_8.1
  • libyang-devel >= 2.1.148-1.el9_8.1
  • libyang-devel-doc >= 2.1.148-1.el9_8.1
 Patchnames:
RHSA-2026:25051
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
  • libyang-extentions >= 1.0.184-150300.3.9.1
  • libyang1 >= 1.0.184-150300.3.9.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-2381
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • libyang-extentions >= 1.0.184-150300.3.9.1
  • libyang1 >= 1.0.184-150300.3.9.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-2381
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
  • libyang2 >= 2.1.55-150500.3.5.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-2335
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
  • libyang2 >= 2.1.55-150500.3.5.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-2335
SUSE Linux Enterprise High Performance Computing 15 SP7
SUSE Linux Enterprise Module for Server Applications 15 SP7
SUSE Linux Enterprise Server 15 SP7
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • libyang2 >= 2.1.148-150700.3.5.1
 Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP7-2026-2337
SUSE Linux Enterprise Server 12 SP5-LTSS
  • libyang2 >= 2.1.148-8.8.1
 Patchnames:
SUSE-SLE-SERVER-12-SP5-LTSS-2026-2334
SUSE Linux Enterprise Server 15 SP4-LTSS
  • libyang-extentions >= 1.0.184-150300.3.9.1
  • libyang1 >= 1.0.184-150300.3.9.1
 Patchnames:
SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-2381
SUSE Linux Enterprise Server 15 SP5-LTSS
  • libyang2 >= 2.1.55-150500.3.5.1
 Patchnames:
SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-2335
SUSE Linux Enterprise Server 15 SP6-LTSS
  • libyang2 >= 2.1.55-150500.3.5.1
 Patchnames:
SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2335
SUSE Linux Enterprise Server 16.0
SUSE Linux Enterprise Server for SAP applications 16.0
  • libyang2 >= 2.1.148-160000.4.1
 Patchnames:
SUSE-SLES-16.0-978
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5
  • libyang2 >= 2.1.148-8.8.1
 Patchnames:
SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-2334
SUSE Linux Enterprise Server for SAP Applications 15 SP4
  • libyang-extentions >= 1.0.184-150300.3.9.1
  • libyang1 >= 1.0.184-150300.3.9.1
 Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP4-2026-2381
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • libyang2 >= 2.1.55-150500.3.5.1
 Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP5-2026-2335
SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • libyang2 >= 2.1.55-150500.3.5.1
 Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP6-2026-2335
SUSE Manager Proxy LTS 4.3
  • libyang-extentions >= 1.0.184-150300.3.9.1
  • libyang1 >= 1.0.184-150300.3.9.1
 Patchnames:
SUSE-SLE-Product-SUSE-Manager-Proxy-4.3-LTS-2026-2381
SUSE Manager Retail Branch Server LTS 4.3
  • libyang-extentions >= 1.0.184-150300.3.9.1
  • libyang1 >= 1.0.184-150300.3.9.1
 Patchnames:
SUSE-SLE-Product-SUSE-Manager-Retail-Branch-Server-4.3-LTS-2026-2381
SUSE Manager Server LTS 4.3
  • libyang-extentions >= 1.0.184-150300.3.9.1
  • libyang1 >= 1.0.184-150300.3.9.1
 Patchnames:
SUSE-SLE-Product-SUSE-Manager-Server-4.3-LTS-2026-2381
openSUSE Tumbleweed
  • libyang-devel >= 3.13.6-3.1
  • libyang-doc >= 3.13.6-3.1
  • libyang3 >= 3.13.6-3.1
  • yang-tools >= 3.13.6-3.1
 Patchnames:
openSUSE-Tumbleweed-2026-10880

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise Server 16.0
  • libyang2 >= 2.1.148-160000.4.1

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP7 libyang Released
SUSE Linux Enterprise Module for Server Applications 15 SP7 libyang Released
SUSE Linux Enterprise Server 15 SP7 libyang Released
SUSE Linux Enterprise Server 16.0 libyang In progress
SUSE Linux Enterprise Server 16.1 libyang Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 libyang Released
SUSE Linux Enterprise Server for SAP applications 16.0 libyang Released
SUSE Linux Enterprise Server for SAP applications 16.1 libyang Affected
openSUSE Leap 16.0 libyang Released
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4 libyang Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS libyang Released
SUSE Linux Enterprise High Performance Computing 15 SP5 libyang Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS libyang Released
SUSE Linux Enterprise Module for Server Applications 15 SP4 libyang Affected
SUSE Linux Enterprise Module for Server Applications 15 SP5 libyang Affected
SUSE Linux Enterprise Module for Server Applications 15 SP6 libyang Affected
SUSE Linux Enterprise Server 12 SP5-LTSS libyang Released
SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security libyang Released
SUSE Linux Enterprise Server 15 SP4 libyang Affected
SUSE Linux Enterprise Server 15 SP4-LTSS libyang Released
SUSE Linux Enterprise Server 15 SP5 libyang Affected
SUSE Linux Enterprise Server 15 SP5-LTSS libyang Released
SUSE Linux Enterprise Server 15 SP6 libyang Affected
SUSE Linux Enterprise Server 15 SP6-LTSS libyang Released
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 libyang Released
SUSE Linux Enterprise Server for SAP Applications 15 SP6 libyang Released
SUSE Manager Proxy 4.3 libyang Affected
SUSE Manager Proxy LTS 4.3 libyang Released
SUSE Manager Retail Branch Server 4.3 libyang Affected
SUSE Manager Retail Branch Server LTS 4.3 libyang Released
SUSE Manager Server 4.3 libyang Affected
SUSE Manager Server LTS 4.3 libyang Released
Products past their end of life and not receiving proactive updates anymore.
SUSE Enterprise Storage 7.1 libyang Affected
SUSE Linux Enterprise High Performance Computing 15 SP3 libyang Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS libyang Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS libyang Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS libyang Released
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS libyang Released
SUSE Linux Enterprise High Performance Computing 15 SP6 libyang Affected
SUSE Linux Enterprise Module for Server Applications 15 SP3 libyang Affected
SUSE Linux Enterprise Real Time 15 SP3 libyang Affected
SUSE Linux Enterprise Real Time 15 SP4 libyang Affected
SUSE Linux Enterprise Server 15 SP3 libyang Affected
SUSE Linux Enterprise Server 15 SP3-BCL libyang Affected
SUSE Linux Enterprise Server 15 SP3-LTSS libyang Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 libyang Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 libyang Released
SUSE Linux Enterprise Server for SAP Applications 15 SP5 libyang Released
SUSE Manager Proxy 4.2 libyang Affected
SUSE Manager Retail Branch Server 4.2 libyang Affected
SUSE Manager Server 4.2 libyang Affected
openSUSE Leap 15.3 libyang Released
openSUSE Leap 15.4 libyang Affected
openSUSE Leap 15.5 libyang Released
openSUSE Leap 15.6 libyang Affected
Products at an unknown state of their lifecycle.
SUSE Manager Proxy 4.3 LTS libyang Released
SUSE Manager Retail Branch Server 4.3 LTS libyang Released
SUSE Manager Server 4.3 LTS libyang Released

SUSE Timeline for this CVE

CVE page created: Fri May 15 00:09:22 2026
CVE page last modified: Tue Jun 23 19:35:21 2026