XRegion in TigerVNC allows remote VNC servers to cause a denial of service (NULL pointer dereference) by leveraging failure to check a malloc return value, a similar issue to CVE-2014-6052.
https://rhn.redhat.com/errata/RHSA-2015-2233.html
https://bugzilla.redhat.com/show_bug.cgi?id=1151312
http://www.securityfocus.com/bid/70390
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html