Cisco Wireless LAN Controller (WLC) devices with software 7.5(102.0) and 7.6(1.62) allow remote attackers to cause a denial of service (device crash) by triggering an exception during attempted forwarding of unspecified IPv6 packets to a non-IPv6 device, aka Bug ID CSCuj01046.
http://www.securitytracker.com/id/1032697
http://www.securityfocus.com/bid/75369
http://tools.cisco.com/security/center/viewAlert.x?alertId=39472