oss-security - Re: CVE request -- kernel: kvm: irqchip_in_kernel() and vcpu->arch.apic inconsistency

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Date: Thu, 29 Mar 2012 19:05:22 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE request -- kernel: kvm: irqchip_in_kernel()
 and vcpu->arch.apic inconsistency

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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