The ATM module in the Linux kernel before 2.4.35.3, when CLIP support is enabled, allows local users to cause a denial of service (kernel panic) by reading /proc/net/atm/arp before the CLIP module has been loaded.
http://www.vupen.com/english/advisories/2007/3246
http://www.securityfocus.com/bid/25798
http://lwn.net/Articles/251162/