Buffer overflow in the syscall implementation in IBM AIX 5.3 allows local users to gain privileges via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/51612
http://www.securityfocus.com/bid/35615
http://www-01.ibm.com/support/docview.wss?uid=isg1IZ54714
http://www-01.ibm.com/support/docview.wss?uid=isg1IZ54713