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Date: Wed, 27 Nov 2013 21:23:37 -0500 (EST)
From: cve-assign@...re.org
To: oss-security@...ts.openwall.com
Cc: cve-assign@...re.org
Subject: CVE-2013-6885 AMD Publ. 51810 Errata 793 system hang

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The person who requested CVE-2013-6885 asked that we send the CVE
assignment here because various open-source software will probably be
adding code to prevent this denial of service attack.

http://support.amd.com/TechDocs/51810_16h_00h-0Fh_Rev_Guide.pdf
http://lists.dragonflybsd.org/pipermail/kernel/2011-December/046594.html
http://www.zdnet.com/blog/hardware/amd-owns-up-to-cpu-bug/18924

  793 Specific Combination of Writes to Write Combined Memory
  Types and Locked Instructions May Cause Core Hang

  Under a highly specific and detailed set of internal timing
  conditions, a locked instruction may trigger a timing sequence whereby
  the write to a write combined memory type is not flushed, causing the
  locked instruction to stall indefinitely.

  Potential Effect on System
  Processor core hang.

  Suggested Workaround
  BIOS should set MSRC001_1020[15] = 1b.

  No fix planned

- -- 
CVE assignment team, MITRE CVE Numbering Authority
M/S M300
202 Burlington Road, Bedford, MA 01730 USA
[ PGP key available through http://cve.mitre.org/cve/request_id.html ]
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