CVE-2026-9567 GPAC MP4Box isom_intern.c MergeFragment null pointer dereference
A local attacker can cause a denial of service via null pointer dereference in GPAC MP4Box, requiring a patch to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9567?
CVE-2026-9567 is a medium-severity vulnerability in GPAC, published on 26 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-9567?
How do I fix CVE-2026-9567?
No fix has been published for CVE-2026-9567 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-9567 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9567 exists.
Sources
Also known as DEBIAN-CVE-2026-9567, GHSA-8h6c-5qr8-7wvp, UBUNTU-CVE-2026-9567.