The NFSv4 client implementation in IBM AIX 5.3, 6.1, and 7.1, and VIOS before 2.2.1.4-FP-25 SP-02, does not properly handle GID values, which allows remote attackers to cause a denial of service via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/78431
http://www.securitytracker.com/id?1027531
http://www.securityfocus.com/bid/55546
http://www.ibm.com/support/docview.wss?uid=isg1IV26436
http://www.ibm.com/support/docview.wss?uid=isg1IV17855
http://www.ibm.com/support/docview.wss?uid=isg1IV12169
http://www.ibm.com/support/docview.wss?uid=isg1IV11629
http://www.ibm.com/support/docview.wss?uid=isg1IV10327
http://secunia.com/advisories/50619
http://aix.software.ibm.com/aix/efixes/security/nfsv4_advisory1.asc