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Vulnerability record · CVE-2024-56171 · published 18 February 2025

CVE-2024-56171: Xmlsoft libxml2 use after free vulnerability

Xmlsoft · Libxml2

libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a use-after-free in xmlSchemaIDCFillNodeTables and xmlSchemaBubbleIDCNodeTables in xmlschemas.c. To exploit this, a crafted XML document must be validated against an XML schema with certain identity constraints, or a crafted XML schema must be used.

9.8 CVSS 3.1 Critical EPSS 1.2% · top 33.6% CWE-416 · Use after free
9.8CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
11References
17 Jun 2026Last modified by NVD

Description

libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a use-after-free in xmlSchemaIDCFillNodeTables and xmlSchemaBubbleIDCNodeTables in xmlschemas.c. To exploit this, a crafted XML document must be validated against an XML schema with certain identity constraints, or a crafted XML schema must be used.

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

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gitlab.gnome.org/GNOME/libxml2/-/issues/828 Issue Tracking
http://seclists.org/fulldisclosure/2025/Apr/10
http://seclists.org/fulldisclosure/2025/Apr/11
http://seclists.org/fulldisclosure/2025/Apr/12
http://seclists.org/fulldisclosure/2025/Apr/13
http://seclists.org/fulldisclosure/2025/Apr/4
http://seclists.org/fulldisclosure/2025/Apr/5
http://seclists.org/fulldisclosure/2025/Apr/8
http://seclists.org/fulldisclosure/2025/Apr/9
https://lists.debian.org/debian-lts-announce/2025/02/msg00028.html
https://security.netapp.com/advisory/ntap-20250328-0010/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2024-56171), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.