local privilege escalation in Linux Kernel

iDEFENSE Inc. informed us about a buffer overflow in the linux 2.4 kernel code which handles ISO9660 filesystems. The original code is not able to handle very long symlink names. The vulnerability can be triggered locally by mounting removable media that contains a malformed filesystem or by using the loopback device. Exploiting this buffer overflow results in kernel-level access to the system.