Use-after-free vulnerability in the vhost_net_set_backend function in drivers/vhost/net.c in the Linux kernel through 3.10.3 allows local users to cause a denial of service (OOPS and system crash) via vectors involving powering on a virtual machine.
https://bugzilla.redhat.com/show_bug.cgi?id=984722
https://bugzilla.redhat.com/show_bug.cgi?id=980643