CVE-2025-11731

Name	CVE-2025-11731
Description	A flaw was found in the exsltFuncResultComp() function of libxslt, which handles EXSLT <func:result> elements during stylesheet parsing. Due to improper type handling, the function may treat an XML document node as a regular XML element node, resulting in a type confusion. This can cause unexpected memory reads and potential crashes. While difficult to exploit, the flaw could lead to application instability or denial of service.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libxslt (PTS)	bullseye	1.1.34-4+deb11u1	vulnerable
	bullseye (security)	1.1.34-4+deb11u3	vulnerable
	bookworm	1.1.35-1+deb12u2	vulnerable
	bookworm (security)	1.1.35-1+deb12u3	vulnerable
	trixie	1.1.35-1.2+deb13u1	vulnerable
	trixie (security)	1.1.35-1.2+deb13u2	vulnerable
	forky, sid	1.1.43-0.2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libxslt	source	(unstable)	(unfixed)

Notes

https://gitlab.gnome.org/GNOME/libxslt/-/issues/151
Fixed by: https://gitlab.gnome.org/GNOME/libxslt/-/commit/fe508f201efb9ea37bfbe95413b8b28251497de3