Synopsis: Linux kernel uselib() privilege elevation
Product: Linux kernel
Version: 2.4 up to and including 2.4.29-rc2, 2.6 up to and including 2.6.10
Vendor: http://www.kernel.org/
CVE: CAN-2004-1235
Author: Paul Starzetz
Date: Jan 07, 2005

More info here. Working exploit in wild!

Use 2.4.29-rc1!