Unknown vulnerability in NFS on Solaris 2.5.1 through Solaris 9 allows an NFS client to cause a denial of service by killing the lockd daemon.
http://www.securityfocus.com/bid/5986
http://www.kb.cert.org/vuls/id/855635
http://www.iss.net/security_center/static/10394.php
http://sunsolve.sun.com/search/document.do?assetkey=1-26-47815-1