IBM DB2 UDB 9.1 before Fixpak 4 assigns incorrect privileges to the (1) DB2ADMNS and (2) DB2USERS alternative groups, which has unknown impact. NOTE: the vendor description of this issue is too vague to be certain that it is security-related.
http://www.vupen.com/english/advisories/2007/3867
http://www.securityfocus.com/bid/26450
http://www-1.ibm.com/support/docview.wss?uid=swg21255607