CVE-2026-2921

Name	CVE-2026-2921
Description	GStreamer RIFF Palette Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the handling of palette data in AVI files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28854.
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)
References	DSA-6167-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
gst-plugins-base1.0 (PTS)	bullseye	1.18.4-2+deb11u2	vulnerable
	bullseye (security)	1.18.4-2+deb11u4	vulnerable
	bookworm	1.22.0-3+deb12u5	vulnerable
	bookworm (security)	1.22.0-3+deb12u6	fixed
	trixie	1.26.2-1	vulnerable
	trixie (security)	1.26.2-1+deb13u1	fixed
	forky, sid	1.28.1-1	fixed

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

Package	Type	Release	Fixed Version	Origin
gst-plugins-base1.0	source	bookworm	1.22.0-3+deb12u6	DSA-6167-1
gst-plugins-base1.0	source	trixie	1.26.2-1+deb13u1	DSA-6167-1
gst-plugins-base1.0	source	(unstable)	1.28.1-1

Notes

https://gstreamer.freedesktop.org/security/sa-2026-0004.html
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/66d1f79c78b573db714434cf08e7531bed4f4473 (main)