Integer overflow in the ping_init_sock function in net/ipv4/ping.c in the Linux kernel through 3.14.1 allows local users to cause a denial of service (use-after-free and system crash) or possibly gain privileges via a crafted application that leverages an improperly managed reference counter.
https://lkml.org/lkml/2014/4/10/736
https://bugzilla.redhat.com/show_bug.cgi?id=1086730
http://www.securitytracker.com/id/1030769
http://www.securityfocus.com/bid/66779