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SUSE libyang Important Security Advisory CVE-2026-41401 CVE-2026-44673

suse
Calendar Grey June 10, 2026
Dist Suse Esm H88
Security update for libyang in SUSE addresses important vulnerabilities, including heap overflow and use-after-free issues.
An update that solves two vulnerabilities can now be installed.

Summary

## 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). ## 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 12 SP5 LTSS zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-2334=1 * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security

Topics%20covered

Topics Covered

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

References

* bsc#1265330

* bsc#1266316

Cross-

* CVE-2026-41401

* CVE-2026-44673

CVSS scores:

* CVE-2026-41401 ( SUSE ): 9.2

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

* CVE-2026-41401 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-41401 ( NVD ): 7.1

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2026-41401 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

* 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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2334-1
Release Date: 2026-06-10T08:42:45Z
Rating: important

Topics%20covered

Topics Covered

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

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