Upgrading to Release 12 Details Upgrade Paths Upgrading directly to Release 12 is supported for these Oracle Applications E-Business Suite release levels: 11.5.7, 11.5.8, 11.5.9 (base CU1, CU2) and 11.5.10 (base CU1, CU2). Release levels 11.5.6 and lower will first require an upgrade to 11.5.10 CU2. To complete the upgrade to Release 12, you must migrate or upgrade your database to Oracle 10g Re..