Multiple memory leaks in the x11_init_protocol function in epan/dissectors/packet-x11.c in the X11 dissector in Wireshark 1.10.x before 1.10.14 and 1.12.x before 1.12.5 allow remote attackers to cause a denial of service (memory consumption) via a crafted packet.
https://security.gentoo.org/glsa/201510-03
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11088
http://www.wireshark.org/security/wnpa-sec-2015-15.html
http://www.securityfocus.com/bid/74637
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html