Bill Rugolsky mailed Alan Cox about a trivial unprivileged local DoS. Linus merged this upstream with a sanitised description. http://linux.bkbits.net:8080/linux-2.6/cset@41db2d65wbgJvuXTv4x9_quExW0vEA This is also included in patch-2.6.10-ac8 but does not seem to appear in RHEL4 GA or 0Day kernels.
Patch has been submitted to rhkernel-list: http://post-office.corp.redhat.com/archives/rhkernel-list/2005-February/msg01179.html
Lifting embargo
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-2005-366.html