A number of vulnerabilities have been found in the Linux 2.2 kernel that have been addressed with the latest 2.2.25 release.
A bug in the kernel module loader code could allow a local user to gain root privileges. This is done by a local user using ptrace and attaching to a modprobe process that is spawned if the user triggers the loading of a kernel module.
All users are encouraged to upgrade to the latest kernel version provided.
For more information, see http://www.mandrakesecure.net/en/advisories/advisory.php?name=MDKSA-2003:039