What is CVE-2024-56171?

CVE-2024-56171 is a high-severity vulnerability in Xmlsoft Libxml2, classified under Use After Free. CVSS score: 7.8/10. Published 2025-02-18.

How severe is CVE-2024-56171?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2024-56171 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Use After Free in Xmlsoft Libxml2

CVE-2024-56171

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 certa…

Vulnerability class: Use-After-Free

EPSS: 0.002 (39.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N.

Affected products

Xmlsoft Libxml2 — versions 0, 2.13.0

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

References

gitlab.gnome.org/GNOME/libxml2/-/issues/828

Frequently asked questions

What is CVE-2024-56171?: CVE-2024-56171 is a high-severity vulnerability in Xmlsoft Libxml2, classified under Use After Free. CVSS score: 7.8/10. Published 2025-02-18.
How severe is CVE-2024-56171?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2024-56171 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.