Cisco NX-OS 5.2(5) on Nexus 7000 devices allows remote attackers to cause a denial of service (device crash) by sending a malformed LLDP packet on the local network, aka Bug ID CSCud89415.
http://www.securitytracker.com/id/1032675
http://www.securityfocus.com/bid/75324
http://tools.cisco.com/security/center/viewAlert.x?alertId=39421