Report from Wei Wang of McAfee Avert Labs: A locally exploitable flaw has been found in the Linux sctp module sctp_make_abort_user function that allows local users to gain root privileges and also execute arbitrary code at kernel privilege level.
committed in kernel 42.0.2
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-2006-0617.html
committed in stream U5 build 42.4. A test kernel with this patch is available from http://people.redhat.com/~jbaron/rhel4/