# CVE-2026-95122: mp4v2 NULL pointer dereference in GenerateTracks

Source: https://junglewise.ai/threats/cve-2026-95122-mp4v2-2-0-0-contains-a-null-pointer-dereference-vulnerability-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-95122 · Severity: high · CVSS 7.5 · Published 2026-10-13

mp4v2 is a library for reading and writing MPEG-4 files. A malformed MP4 file can trigger a NULL pointer dereference in the track parsing code, causing the application using mp4v2 to crash. An attacker can exploit this by sending a crafted MP4 file to cause a denial of service.

Technologies: [TechSmith Mp4v2](https://junglewise.ai/threats/technologies/mp4v2). Vendors: [TechSmith](https://junglewise.ai/threats/vendors/techsmith).

## Quick answers

**Is CVE-2026-95122 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-95122 being exploited in the wild.

**How severe is CVE-2026-95122?** High severity, with a CVSS score of 7.5, published 13 October 2026.

**Which products and versions are affected?** TechSmith Mp4v2 2.0.0.

**Is there a fix for CVE-2026-95122?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-95122 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-95122?** Check whether you run TechSmith Mp4v2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A NULL pointer dereference (CWE-476) occurs in MP4File::GenerateTracks() in src/mp4file.cpp when parsing a malformed trak/mdia/hdlr structure that leaves the handler type unset. The function passes the NULL handler-type pointer directly to strcmp() without validation, causing undefined behavior and process termination. The attack vector is network-based, requiring the victim to open or process a crafted MP4 file.

## Affected products

- TechSmith mp4v2 2.0.0

## Timeline

- 2026-10-13: disclosed
- 2026-10-10: other: Vulnerability report filed

## References

- [https://gist.github.com/1820893135-pixel/607844240f0c965b4dc1f5fdb7ac6148](https://gist.github.com/1820893135-pixel/607844240f0c965b4dc1f5fdb7ac6148)
- [https://github.com/TechSmith/mp4v2/issues/99](https://github.com/TechSmith/mp4v2/issues/99)

## Related threats

- [mp4v2 integer underflow in RTP atom parsing](https://junglewise.ai/threats/cve-2026-95121-an-issue-in-mp4v2-2-0-0-allows-an-attacker-to-execute-arbitrary)