CVE-2025-12105

Name	CVE-2025-12105
Description	A flaw was found in the asynchronous message queue handling of the libsoup library, widely used by GNOME and WebKit-based applications to manage HTTP/2 communications. When network operations are aborted at specific timing intervals, an internal message queue item may be freed twice due to missing state synchronization. This leads to a use-after-free memory access, potentially crashing the affected application. Attackers could exploit this behavior remotely by triggering specific HTTP/2 read and cancel sequences, resulting in a denial-of-service condition.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1118783

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libsoup2.4 (PTS)	bullseye	2.72.0-2	undetermined
	bullseye (security)	2.72.0-2+deb11u2	undetermined
	bookworm	2.74.3-1+deb12u1	undetermined
	sid, trixie	2.74.3-10.1	undetermined
libsoup3 (PTS)	bookworm	3.2.3-0+deb12u2	vulnerable
	trixie	3.6.5-3	vulnerable
	forky, sid	3.6.5-4	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libsoup2.4	source	(unstable)	undetermined
libsoup3	source	(unstable)	(unfixed)			1118783

Notes

[trixie] - libsoup3 <no-dsa> (Minor issue)
[bookworm] - libsoup3 <no-dsa> (Minor issue)
https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/481
Fixed by: https://gitlab.gnome.org/GNOME/libsoup/-/commit/9ba1243a24e442fa5ec44684617a4480027da960
double-check libsoup2.4, looks introduced later when refactoring and introducing run_until_read_done()