CVE-2026-9567

Name	CVE-2026-9567
Description	A security flaw has been discovered in GPAC up to 2.4.0. Affected is the function MergeFragment of the file src/isomedia/isom_intern.c of the component MP4Box. The manipulation results in null pointer dereference. The attack needs to be approached locally. The exploit has been released to the public and may be used for attacks. The patch is identified as 525bf1af642c30af04e4df5345e6d798c0a4d8a1. It is advisable to implement a patch to correct this issue.
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
gpac (PTS)	bullseye (security), bullseye	1.0.1+dfsg1-4+deb11u3	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
gpac	source	bullseye	(unfixed)	end-of-life
gpac	source	(unstable)	(unfixed)

Notes

[bullseye] - gpac <end-of-life> (EOLed in debian-security-support)
https://github.com/gpac/gpac/issues/3549
https://github.com/gpac/gpac/commit/525bf1af642c30af04e4df5345e6d798c0a4d8a1