Integer overflow in the VNC display driver in QEMU before 2.1.0 allows attachers to cause a denial of service (process crash) via a CLIENT_CUT_TEXT message, which triggers an infinite loop.
https://www.arista.com/en/support/advisories-notices/security-advisories/1188-security-advisory-14
https://github.com/qemu/qemu/commit/f9a70e79391f6d7c2a912d785239ee8effc1922d
http://www.ubuntu.com/usn/USN-2745-1
http://www.openwall.com/lists/oss-security/2015/09/02/7
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00026.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168671.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168646.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168077.html