CVE-2024-56171
libxml2: Use-After-Free in libxml2
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · February 18, 2025
Updated · October 14, 2026
Description
A flaw was found in libxml2. This vulnerability allows a use-after-free via a crafted XML document validated against an XML schema with certain identity constraints or a crafted XML schema.
Statement
This vulnerability is rated as important because it involves a use-after-free flaw in the xmlSchemaIDCFillNodeTables and xmlSchemaBubbleIDCNodeTables functions. A maliciously crafted XML document or schema, containing specific identity constraints, can be used to trigger this vulnerability and potentially gain unauthorized access or cause a denial-of-service condition.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
CVSS / CWE
CVSS 3.1 · 8.1CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE-416 · Use After Free