NULL pointer dereference in Gpac
CVE-2026-9567
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (4.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Gpac — versions 2.0, 2.1, 2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/365629 (technical-description, vdb-entry)
- vuldb.com/vuln/365629/cti (signature, permissions-required)
- vuldb.com/submit/816075 (third-party-advisory)
- github.com/gpac/gpac/issues/3549 (issue-tracking)
- github.com/user-attachments/files/27196918/poc.zip (exploit)
- github.com/makesoftwaresafe/gpac/commit/525bf1af642c30af04e4df5345e6d798c0a4d8a1 (patch)
- github.com/gpac/gpac/ (product)
Frequently asked questions
- What is CVE-2026-9567?
- CVE-2026-9567 is a low-severity vulnerability in Gpac, classified under Improper Resource Shutdown or Release. CVSS score: 3.3/10. Published 2026-05-26.
- How severe is CVE-2026-9567?
- Low severity. CVSS v3 base score is 3.3 out of 10.