The lua_websocket_read function in lua_request.c in the mod_lua module in the Apache HTTP Server through 2.4.12 allows remote attackers to cause a denial of service (child-process crash) by sending a crafted WebSocket Ping frame after a Lua script has called the wsupgrade function.
http://advisories.mageia.org/MGASA-2015-0099.html
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
http://lists.apple.com/archives/security-announce/2015/Sep/msg00004.html
http://lists.opensuse.org/opensuse-updates/2015-03/msg00006.html
http://rhn.redhat.com/errata/RHSA-2015-1666.html
https://github.com/apache/httpd/commit/643f0fcf3b8ab09a68f0ecd2aa37aafeda3e63ef
https://github.com/apache/httpd/commit/78eb3b9235515652ed141353d98c239237030410
https://support.apple.com/HT205219
https://support.apple.com/kb/HT205031
http://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x/CHANGES
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html