Cetrain Cisco Catalyst 6500 Series and Cisco 7600 Router devices that run branches of Cisco IOS based on 12.2 can be vulnerable to a denial of service vulnerability that can prevent any traffic from entering an affected interface. The risk is LOW. Exploitation of this vulnerability may result in a blocked interface input queue, memory leak, and/or restart of the device. Repeated exploitation of this vulnerability may result in an extended denial of service.