When using the FIFO-based event channels, there are no checks for the existence of a control block when binding an event or moving it to a different VCPU. As a result, a buggy or malicious guest can crash the host. References: http://xenbits.xen.org/xsa/advisory-107.html http://www.openwall.com/lists/oss-security/2014/09/09/22 Acknowledgements: Red Hat would like to thank the Xen for reporting this issue. Xen acknowledges Vitaly Kuznetsov from Red Hat as the original reporter of this issue and David Vrabel of Citrix as the one who diagnosed this issue as having security repercussions.
Statement: Not vulnerable. This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.
Created xen tracking bugs for this issue: Affects: fedora-all [bug 1140287]