"A locally exploitable flaw has been found in the Linux ELF binary format loader's core dump function that allows local users to gain root privileges and also execute arbitrary code at kernel privilege level." For the full description see http://www.securityfocus.com/archive/1/397966/2005-05-08/2005-05-14/0 For the proposed patch see bug #157450 (not backported)
After reviewing this issue and testing the expliot for CAN-2005-1263, I've found that this has been corrected as of e.57
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2005-551.html