Weblogic Patching

Weblogic Patching : Generic Information

Oracle has started releasing PSU ( Patch Set Update ) from Weblogic Server 10.3.4 onwards, and depreciated BSU ( smart update ) utility from Weblogic Server 12.1.2 onwards. That means, You can still use BSU to apply patch till WLS 12.1.1 but from WLS 12.1.2 you have to use Opatch utility which is bundled with weblogic installer or you can download from oracle support website as well.

PSU doesn't mean Oracle will not be going to release CPU ( Critical Patch Updates ), CPU still be there for all versions prior to 12.1.2 versions as per requirement and criticality.

Read my below posts for more details.

Weblogic Server Patching, BSU ( Smart Update Utility )
Weblogic Server Patching, Prior to 12.1.1, On and after 12.1.2 ( Release of PSU [ Patch Set Update ])