Memory leak in the v9fs_device_unrealize_common function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local privileged guest OS users to cause a denial of service (host memory consumption and possibly QEMU process crash) via vectors involving the order of resource cleanup.
https://security.gentoo.org/glsa/201701-49
https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg03278.html
http://www.securityfocus.com/bid/94729
http://www.openwall.com/lists/oss-security/2016/12/08/7
http://www.openwall.com/lists/oss-security/2016/12/06/11
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=4774718e5c194026ba5ee7a28d9be49be3080e42