|Bugzilla:||756084: CVE-2011-4347 kernel: kvm: device assignment DoS|
The MITRE CVE dictionary describes this issue as:
The kvm_vm_ioctl_assign_device function in virt/kvm/assigned-dev.c in the KVM subsystem in the Linux kernel before 3.1.10 does not verify permission to access PCI configuration space and BAR resources, which allows host OS users to assign PCI devices and cause a denial of service (host OS crash) via a KVM_ASSIGN_PCI_DEVICE operation.
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 and Red Hat Enterprise MRG as they did not provide support for the KVM subsystem. This has been addressed in Red Hat Enterprise Linux 6 via https://rhn.redhat.com/errata/RHSA-2012-0350.html. A future kvm update in Red Hat Enterprise 5 may address this flaw.
CVSS v2 metrics
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Red Hat security errata
|Red Hat Enterprise Linux Server EUS (v. 6.1) (kernel)||RHSA-2012:1042||June 26, 2012|
|Red Hat Enterprise Linux Virtualization version 5 (kvm)||RHSA-2012:0149||February 21, 2012|
|Red Hat Enterprise Linux version 6 (kernel)||RHSA-2012:0350||March 06, 2012|
Red Hat would like to thank Sasha Levin for reporting this issue.
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For clarification or corrections please contact the Red Hat Security Response Team.