IBM AIX 7.1 and 7.2 allows a local user to open a file with a specially crafted argument that would crash the system. IBM APARs: IV91488, IV91487, IV91456, IV90234.
http://www.securitytracker.com/id/1037759
http://www.securityfocus.com/bid/95888
http://aix.software.ibm.com/aix/efixes/security/sysproc_advisory.asc