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openSUSE Libyang Important Use-After-Free Heap Overflow Vuln 2026-2335-1

opensuse
Calendar Grey June 10, 2026
Dist Opensuse Esm H88
Update for libyang on openSUSE addresses two critical issues: a use-after-free and integer overflow vulnerability.
An update that solves two vulnerabilities can now be installed.

Description

This update for libyang fixes the following issues

* CVE-2026-41401: use-after-free in `lyd_parser_set_data_flags` when

processing crafted YANG XML documents with specific metadata attributes

(bsc#1266316).

* 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).

Topics%20covered

Topics Covered

security advisory important heap overflow OpenSUSE use-after-free libyang

Patch

## 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 15.5

zypper in -t patch SUSE-2026-2335=1

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5

zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-2335=1

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5

zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-2335=1

* SUSE Linux Enterprise Server 15 SP5 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-2335=1

* SUSE Linux Enterprise Server 15 SP6 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2335=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP5

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-2335=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP6

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-2335=1

Package List

* openSUSE Leap 15.5 (aarch64 ppc64le s390x x86_64 i586)

* libyang-debuginfo-2.1.55-150500.3.5.1

* libyang-debugsource-2.1.55-150500.3.5.1

* yang-tools-debuginfo-2.1.55-150500.3.5.1

* libyang2-debuginfo-2.1.55-150500.3.5.1

* yang-tools-2.1.55-150500.3.5.1

* libyang2-2.1.55-150500.3.5.1

* libyang-devel-2.1.55-150500.3.5.1

* openSUSE Leap 15.5 (noarch)

* libyang-doc-2.1.55-150500.3.5.1

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64

x86_64)

* libyang-debuginfo-2.1.55-150500.3.5.1

* libyang-debugsource-2.1.55-150500.3.5.1

* libyang2-2.1.55-150500.3.5.1

* libyang2-debuginfo-2.1.55-150500.3.5.1

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64

x86_64)

* libyang-debuginfo-2.1.55-150500.3.5.1

* libyang-debugsource-2.1.55-150500.3.5.1

* libyang2-2.1.55-150500.3.5.1

* libyang2-debuginfo-2.1.55-150500.3.5.1

* SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)

* libyang-debuginfo-2.1.55-150500.3.5.1

* libyang-debugsource-2.1.55-150500.3.5.1

*...

Read the Full Advisory

References

* bsc#1265330

* bsc#1266316

## References:

* https://www.suse.com/security/cve/CVE-2026-41401.html

* https://www.suse.com/security/cve/CVE-2026-44673.html

* https://bugzilla.suse.com/show_bug.cgi?id=1265330

* https://bugzilla.suse.com/show_bug.cgi?id=1266316

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2335-1
Release Date: 2026-06-10T08:43:18Z
Affected Products: * openSUSE Leap 15.5 * SUSE Linux Enterprise High Performance Computing 15 SP5 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 * SUSE Linux Enterprise Server 15 SP5 * SUSE Linux Enterprise Server 15 SP5 LTSS * SUSE Linux Enterprise Server 15 SP6 * SUSE Linux Enterprise Server 15 SP6 LTSS * SUSE Linux Enterprise Server for SAP Applications 15 SP5 * SUSE Linux Enterprise Server for SAP Applications 15 SP6

Topics%20covered

Topics Covered

security advisory important heap overflow OpenSUSE use-after-free libyang

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