The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service (memory and CPU consumption) via a large (1) websocket payload or (2) HTTP headers section.
lists.fedoraproject.org/pipermail/package-announce/2015-April/154656.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/155196.html
lists.opensuse.org/opensuse-security-announce/2015-05/msg00033.html
lists.opensuse.org/opensuse-security-announce/2015-05/msg00042.html
rhn.redhat.com/errata/RHSA-2015-1931.html
rhn.redhat.com/errata/RHSA-2015-1943.html
www.debian.org/security/2015/dsa-3259
www.openwall.com/lists/oss-security/2015/03/24/9
www.openwall.com/lists/oss-security/2015/04/09/6
www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
www.securityfocus.com/bid/73303
www.securitytracker.com/id/1033975
www.ubuntu.com/usn/USN-2608-1
lists.gnu.org/archive/html/qemu-devel/2015-03/msg04894.html
lists.gnu.org/archive/html/qemu-devel/2015-03/msg04895.html
lists.gnu.org/archive/html/qemu-devel/2015-03/msg04896.html
security.gentoo.org/glsa/201602-01