The chaining functionality in the Distributed Relational Database Architecture (DRDA) module in IBM DB2 9.7 before FP6 and 9.8 before FP5 allows remote attackers to cause a denial of service (NULL pointer dereference, and resource consumption or daemon crash) via a crafted request.
https://exchange.xforce.ibmcloud.com/vulnerabilities/75418
http://www.securityfocus.com/bid/53873
http://www.ibm.com/support/docview.wss?uid=swg21597090