IBM DB2 8.1 before FixPak 14 allows remote attackers to cause a denial of service via a crafted SQLJRA packet, which causes a NULL pointer dereference in the sqle_db2ra_as_recvrequest function in DB2ENGN.DLL, a different issue than CVE-2006-4257.
http://www.securityfocus.com/bid/21646
http://www.appsecinc.com/resources/alerts/db2/2006-11-30.shtml