CVE-2026-59692

Name	CVE-2026-59692
Description	A stack buffer overflow vulnerability was found in GStreamer's DTLS plugin. During a DTLS handshake, the peer certificate Subject Distinguished Name is printed into a fixed-size 2048-byte stack buffer without bounds checking. A remote unauthenticated attacker can send a certificate with an oversized Subject DN that exceeds the buffer, causing a stack buffer overflow and process crash, resulting in denial of service.
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
gst-plugins-bad1.0 (PTS)	bullseye	1.18.4-3+deb11u4	vulnerable
	bullseye (security)	1.18.4-3+deb11u6	vulnerable
	bookworm, bookworm (security)	1.22.0-4+deb12u7	vulnerable
	trixie (security), trixie	1.26.2-3+deb13u2	vulnerable
	forky, sid	1.28.5-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
gst-plugins-bad1.0	source	(unstable)	1.28.5-1

Notes

[trixie] - gst-plugins-bad1.0 <no-dsa> (Minor issue)
https://gstreamer.freedesktop.org/security/sa-2026-0062.html
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12053
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/9bb455393b8ccb48e63027f3e30285f80cf3762c (1.28.5)