CVE-2025-15667 GPAC MP4Box avc_ext.c gf_isom_nalu_sample_rewrite double free
A double free vulnerability in GPAC's MP4Box allows local attackers to cause denial of service or potentially execute code via crafted media files.
- 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-2025-15667?
CVE-2025-15667 is a medium-severity use after free vulnerability in GPAC, published on 6 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was determined in GPAC up to 2.5-DEV. This vulnerability affects the function gf_isom_nalu_sample_rewrite of the file src/isomedia/avc_ext.c of the component MP4Box. This manipulation of the argument nalu_out_bs causes double free. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: f29f955f2a3b5e8e507caad3e52319f961bf37bf. To fix this issue, it is recommended to deploy a patch.
Which versions are affected by CVE-2025-15667?
How do I fix CVE-2025-15667?
No fix has been published for CVE-2025-15667 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-15667 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15667 exists.
Sources
Also known as DEBIAN-CVE-2025-15667, GHSA-r4c4-62x2-m3ww, UBUNTU-CVE-2025-15667.