FreeBSD 9.3 before p33, 10.1 before p26, and 10.2 before p9 allow remote attackers to cause a denial of service (kernel crash) via vectors related to creating a TCP connection with the TCP_MD5SIG and TCP_NOOPT socket options.Referenceshttp://www.securitytracker.com/id/1034677https://security.FreeBSD.org/advisories/FreeBSD-SA-16:05.tcp.asc
