Hewlett-Packard (HP) ProCurve 3500yl, 6200yl, and 5400zl switches with software before K.11.33 allow remote attackers to cause a denial of service (possibly memory leak or system crash) via unknown vectors.
http://www.vupen.com/english/advisories/2006/3136
http://www.securityfocus.com/bid/19310
http://www.securityfocus.com/archive/1/442033/100/0/threaded
http://securitytracker.com/id?1016623