CVE-2026-41401

medium

Published 2026-05-26 · Modified 2026-05-26

CVSS v3

6.5

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2

—

VIR risk

6.5

Description

libyang before 5.2.6 contains a heap use-after-free write vulnerability in lyd_parser_set_data_flags that incorrectly updates metadata list pointers when freeing non-head default metadata entries. Attackers can trigger this vulnerability by submitting crafted YANG XML documents with specific metadata attributes to applications parsing untrusted XML data, causing process crashes or potential code execution.

Predictions

Exploit likelihood

75%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-41401.html

OS impact

OS	Version	Status	Fixed in
sles		affected

References

https://github.com/CESNET/libyang/commit/6b5ed47ee674fbe86b31bbebc4ff26889aeff38c
https://github.com/CESNET/libyang/security/advisories/GHSA-9f49-8x56-jmjc
https://red.anthropic.com/2026/cvd/findings/ANT-2026-TZQ1KH7E
https://www.vulncheck.com/advisories/libyang-heap-use-after-free-write-in-xml-metadata-parsing
https://www.suse.com/security/cve/CVE-2026-41401.html

CWEs

CWE-416

Verify integrity in audit chain (admin only). AS-IS.