Linux kernel 2.2.1 through 2.2.19, and 2.4.1 through 2.4.10, allows local users to cause a denial of service via a series of deeply nested symlinks, which causes the kernel to spend extra time when trying to access the link.
http://www.securityfocus.com/bid/3444
http://www.linuxsecurity.com/advisories/other_advisory-1650.html
http://marc.info/?l=bugtraq&m=100350685431610&w=2
http://marc.info/?l=bugtraq&m=100343090106914&w=2
http://frontal2.mandriva.com/security/advisories?name=MDKSA-2001:079
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-0890
http://www.novell.com/linux/security/advisories/2001_036_kernel_txt.html
http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-082.php3
http://www.iss.net/security_center/static/7312.php
http://download.immunix.org/ImmunixOS/7.0/updates/IMNX-2001-70-035-01