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Bug 294625 (CVE-2009-4031) - Kernel: KVM x86 emulator limit instructions to 15 bytes (CVE-2009-4031)
Summary: Kernel: KVM x86 emulator limit instructions to 15 bytes (CVE-2009-4031)
Status: RESOLVED FIXED
Alias: CVE-2009-4031
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: Gentoo Security
URL: http://git.kernel.org/?p=linux/kernel...
Whiteboard: [linux <2.6.32]
Keywords:
Depends on:
Blocks:
 
Reported: 2009-11-25 18:16 UTC by Bjoern Tropf (RETIRED)
Modified: 2013-09-15 18:49 UTC (History)
0 users

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Runtime testing required: ---

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Description Bjoern Tropf (RETIRED) gentoo-dev 2009-11-25 18:16:08 UTC 
Cve pending...
Comment 1 Stefan Behte (RETIRED) gentoo-dev Security 2009-12-12 00:58:30 UTC 
CVE-2009-4031 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-4031):
  The do_insn_fetch function in arch/x86/kvm/emulate.c in the x86
  emulator in the KVM subsystem in the Linux kernel before
  2.6.32-rc8-next-20091125 tries to interpret instructions that contain
  too many bytes to be valid, which allows guest OS users to cause a
  denial of service (increased scheduling latency) on the host OS via
  unspecified manipulations related to SMP support.