Date: Wed, 25 Nov 2009 16:03:33 +0800 From: Eugene Teo <eugeneteo@...nel.sg> To: oss-security@...ts.openwall.com CC: "Steven M. Christey" <coley@...us.mitre.org> Subject: CVE request: kernel: KVM: x86 emulator: limit instructions to 15 bytes 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." http://git.kernel.org/?p=linux/kernel/git/avi/kvm.git;a=commitdiff;h=e42d9b8141d1f54ff72ad3850bb110c95a5f3b88 https://bugzilla.redhat.com/show_bug.cgi?id=541160 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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