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Privileged guest user could trigger BUG_ON() in apic_cluster_id() when writing certain values to ICR register to request an IPI, while in x2apic mode. A privileged guest user could use this flaw to crash the host. Acknowledgements: Red Hat would like to thank Lars Bull of Google for reporting this issue.
Statement: Not vulnerable. This issue did not affect the versions of kvm packages as shipped with Red Hat Enterprise Linux 5. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise 6. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise MRG 2 as they did not provide support for the KVM subsystem.
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1042099]
kernel-3.12.5-200.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
kernel-3.12.5-302.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.