bug 128916 outlines problems with the io_edgeport driver. This could potentially allow a USB dongle to crash the kernel or gain privileges on insertion. A tested patch for this issue is available: https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=107493&action=view
A fix for this problem has just been committed to the RHEL2.1 E7 patch pool (in kernel version 2.4.18-e.53)
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-2005-017.html