Buffer overflow in the send_control_msg function in hw/char/virtio-serial-bus.c in QEMU before 2.4.0 allows guest users to cause a denial of service (QEMU process crash) via a crafted virtio control message.
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168077.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168646.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168671.html
https://github.com/qemu/qemu/commit/7882080388be5088e72c425b02223c02e6cb4295
https://lists.gnu.org/archive/html/qemu-devel/2015-07/msg05458.html