fuser in IBM AIX 6.1 and 7.1, and VIOS 2.2.1.4-FP-25 SP-02, does not properly restrict the -k option, which allows local users to kill arbitrary processes via a crafted command line.
https://exchange.xforce.ibmcloud.com/vulnerabilities/78907
http://www.securitytracker.com/id?1027586
http://www.securityfocus.com/bid/55726
http://www.ibm.com/support/docview.wss?uid=isg1IV28756
http://www.ibm.com/support/docview.wss?uid=isg1IV28754
http://www.ibm.com/support/docview.wss?uid=isg1IV28749
http://www.ibm.com/support/docview.wss?uid=isg1IV28151
http://secunia.com/advisories/50708
http://aix.software.ibm.com/aix/efixes/security/fuser_advisory.asc