CVE-2026-125704

Name	CVE-2026-125704
Description	A use-after-free flaw was found in GStreamer core buffer value deserialization. When serialized buffer text contains an invalid character, an error path frees a mapped buffer before unmapping it. Applications that parse untrusted caps or structure data can reach a freed-buffer read and may crash. A network-facing GStreamer Data Protocol receiver can process such caps data without user interaction; further impact has not been established.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
gstreamer1.0 (PTS)	bookworm, bookworm (security)	1.22.0-2+deb12u1	vulnerable
	trixie	1.26.2-2	vulnerable
	forky, sid	1.28.9-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
gstreamer1.0	source	(unstable)	1.28.3-1

Notes

https://gstreamer.freedesktop.org/security/sa-2026-0028.html
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11583
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/3703541094f2d8026a7a70765a1acd0341bd356f (1.28.3)