CVE Database


Impact: Moderate
Public: 2011-11-20
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.

Find out more about CVE-2011-4347 from the MITRE CVE dictionary and NIST NVD.


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 A future kvm update in Red Hat Enterprise 5 may address this flaw.

CVSS v2 metrics

Base Score: 4
Base Metrics: AV:L/AC:H/Au:N/C:N/I:N/A:C
Access Vector: Local
Access Complexity: High
Authentication: None
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date
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

External References


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.