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Date: Wed, 25 Nov 2009 11:59:32 -0500 (EST)
From: Josh Bressers <>
Cc: "Steven M. Christey" <>
Subject: Re: CVE request: kernel: KVM: x86 emulator: limit
 instructions to 15 bytes

Please use CVE-2009-4031 for this.



----- "Eugene Teo" <> wrote:

> Quoting from the patch: "While we are never normally passed an 
> instruction that exceeds 15 bytes, smp games can cause us to attempt
> to 
> interpret one, which will cause large latencies in non-preempt
> hosts."
> I understand that a malicious guest can cause long scheduling
> latencies 
> in the host, resulting in a denial of service, but I have not 
> investigated this further to determine if it has more severe
> consequences.
> Thanks, Eugene
> -- 
> Eugene Teo / Red Hat Security Response Team

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