The DRDA Services component in IBM DB2 UDB 9.5 before FP6a allows remote authenticated users to cause a denial of service (database server ABEND) by using the client CLI on Linux, UNIX, or Windows for executing a prepared statement with a large number of parameter markers.

Memory leak in the Relational Data Services component in IBM DB2 UDB 9.5 before FP6a allows remote authenticated users to cause a denial of service (heap memory consumption) by executing a (1) user-defined function (UDF) or (2) stored procedure while using a different code page than the database server.

The "Query Compiler, Rewrite, Optimizer" component in IBM DB2 UDB 9.5 before FP6a allows remote authenticated users to cause a denial of service (CPU consumption) via a crafted query involving certain UNION ALL views, leading to an indefinitely large amount of compilation time.