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SUSE SLES12 Security Update : libyang (SUSE-SU-2026:2334-1)

high Nessus Plugin ID 321038

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLES12 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2334-1 advisory.

 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).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected libyang2 package.

See Also

https://bugzilla.suse.com/1265330

https://bugzilla.suse.com/1266316

http://www.nessus.org/u?58aed361

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

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

Plugin Details

Severity: High

ID: 321038

File Name: suse_SU-2026-2334-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/14/2026

Updated: 6/14/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:C

CVSS Score Source: CVE-2026-44673

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.1

Threat Score: 4.9

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-41401

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:12, p-cpe:/a:novell:suse_linux:libyang2

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 6/10/2026

Vulnerability Publication Date: 5/14/2026

Reference Information

CVE: CVE-2026-41401, CVE-2026-44673

SuSE: SUSE-SU-2026:2334-1