From $URL : Description A vulnerability has been reported in Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service). The vulnerability is caused due to a race condition error within the "install_user_keyrings()" function (security/keys/process_keys.c) when the "uid" and "uid-session" are not created and can be exploited to dereference a NULL-pointer and cause a crash. Solution No official solution is currently available. Provided and/or discovered by The vendor credits Mateusz Guzik, Red Hat. Original Advisory https://lkml.org/lkml/2013/3/6/535 http://www.openwall.com/lists/oss-security/2013/03/07/1
Patch in mainline 3.9 onwards