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Re: CVE request -- kernel: kvm: irqchip_in_kernel() and vcpu->arch.apic inconsistency
From: Kurt Seifried <kseifried () redhat com>
Date: Thu, 29 Mar 2012 19:05:22 -0600

On 03/29/2012 01:58 PM, Petr Matousek wrote:
If some vcpus are created before KVM_CREATE_IRQCHIP, then
irqchip_in_kernel() and vcpu->arch.apic will be inconsistent, leading to
potential NULL pointer dereferences.

A unprivileged local user could use this flaw to crash the system.

Upstream fix:
http://git.kernel.org/?p=virt/kvm/kvm.git;a=commit;h=5b40572ed5f0344b9dbee486a17c589ce1abe1a3

References:
http://comments.gmane.org/gmane.comp.emulators.kvm.devel/86217
https://bugzilla.redhat.com/show_bug.cgi?id=808199

Thanks,

Please use CVE-2012-1601 for this issue.

-- 
Kurt Seifried Red Hat Security Response Team (SRT)


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