CVE-2025-49794

NameCVE-2025-49794
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1107755

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libxml2 (PTS)bullseye2.9.10+dfsg-6.7+deb11u4vulnerable
bullseye (security)2.9.10+dfsg-6.7+deb11u7vulnerable
bookworm2.9.14+dfsg-1.3~deb12u1vulnerable
bookworm (security)2.9.14+dfsg-1.3~deb12u2vulnerable
sid, trixie2.12.7+dfsg+really2.9.14-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libxml2source(unstable)(unfixed)1107755

Notes

[bookworm] - libxml2 <postponed> (Minor issue; revisit when fixed upstream)
https://gitlab.gnome.org/GNOME/libxml2/-/issues/931
Fixed by: https://gitlab.gnome.org/GNOME/libxml2/-/commit/71e1e8af5ee46dad1b57bb96cfbf1c3ad21fbd7b

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