The ssi_sd_transfer function in hw/sd/ssi-sd.c in QEMU before 1.7.2 allows remote attackers to execute arbitrary code via a crafted arglen value in a savevm image.
http://lists.nongnu.org/archive/html/qemu-stable/2014-07/msg00187.html
http://lists.gnu.org/archive/html/qemu-devel/2013-12/msg00394.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-May/133345.html
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=a9c380db3b8c6af19546a68145c8d1438a09c92b