CVE-2026-9567 GPAC MP4Box isom_intern.c MergeFragment null pointer dereference

A security flaw has been discovered in GPAC up to 2.4.0. Affected is the function MergeFragment of the file src/isomedia/isomintern.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 publ...

CVE-2026-9567

GPAC MP4Box (up to version 2.4.0) houses a vulnerability in isomedia/isom_intern.c: MergeFragment, where input handling can trigger a null pointer dereference. Exploitation is local, and a public PoC/exploit exists; this confirms practical risk under local access conditions. The patch is identifi...