The virtqueue_map_sg function in hw/virtio/virtio.c in QEMU before 1.7.2 allows remote attackers to execute arbitrary files via a crafted savevm image, related to virtio-block or virtio-serial read.
https://bugzilla.redhat.com/show_bug.cgi?id=1066401
http://rhn.redhat.com/errata/RHSA-2014-0744.html
http://rhn.redhat.com/errata/RHSA-2014-0743.html
http://lists.nongnu.org/archive/html/qemu-stable/2014-07/msg00187.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-May/133345.html
http://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=36cf2a37132c7f01fa9adb5f95f5312b27742fd4