GPAC MP4Box isom_intern.c MergeFragment null pointer dereference
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-404.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | GPAC | 2.0; 2.1; 2.2; 2.3; 2.4.0 | — | No fix listed | CNA |
- GPAC Vendor— Affected 2.0; 2.1; 2.2; 2.3; 2.4.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-9567
- 2026-10-03 Alias added: GHSA-8h6c-5qr8-7wvp
References
Sources
- CVE-2026-9567 · CVE Program
- CVE-2026-9567 · NVD
- FIRST EPSS
- GHSA-8h6c-5qr8-7wvp · GitHub Advisory Database · CC BY 4.0
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