CVE-2025-49794

Name	CVE-2025-49794
Description	A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the <sch:name path="..."/> schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4251-1
Debian Bugs	1107755

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libxml2 (PTS)	bullseye	2.9.10+dfsg-6.7+deb11u4	vulnerable
	bullseye (security)	2.9.10+dfsg-6.7+deb11u8	fixed
	bookworm, bookworm (security)	2.9.14+dfsg-1.3~deb12u4	fixed
	trixie (security), trixie	2.12.7+dfsg+really2.9.14-2.1+deb13u1	fixed
	forky, sid	2.14.5+dfsg-0.2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
libxml2	source	bullseye	2.9.10+dfsg-6.7+deb11u8	DLA-4251-1
libxml2	source	bookworm	2.9.14+dfsg-1.3~deb12u3
libxml2	source	(unstable)	2.12.7+dfsg+really2.9.14-2		1107755

Notes

https://gitlab.gnome.org/GNOME/libxml2/-/issues/931
Fixed by: https://gitlab.gnome.org/GNOME/libxml2/-/commit/71e1e8af5ee46dad1b57bb96cfbf1c3ad21fbd7b