Oracle releases patches every quarter .Ex JAN,APR,JUL and OCT Patches.Refer below screen reference .Each patch containg some product fixes ,security fixes
Before applying the patch go through the Readme to know the pre-requisite .
It is always recommended to update Underlined JAVA along with Weblogic.Download Latest JAVA, Opatch and Oracle Patches.
1.JAVA Update Take backup of JAVA and replace with New Java . Copy cacerts from old java/jre/lib/security to new java [ This will make sure we don't get any inteface system connectivity issue ] .
2.Apply Opatch patch [ if required are per pre-requisite] Extracted downloaded file to $WLS_HOME/patch/ and Execute the below comand to apply patch to Opatch cd to extracted patch file $JAVA_HOME/bin/jar -xf <<PATCH FILE>> $JAVA_HOME/bin/java -Djava.io.tmpdir=$WLS_HOME -jar opatch_generic.jar oracle_home=$WLS_HOME -silent -invPtrLoc $WLS_HOME/oraInst.loc -ignoreSysPrereqs -J-Doracle.installer.oh_admin_acl=true OR Use Below $WLS_HOME/Opatch/opatch apply -jdk $JAVA_HOME
3.Apply Weblogic patch Extract the downloaded patch to $WLS_HOME/patch/ using $JAVA_HOME/bin/jar -xf <<PATCH FILE>> $WLS_HOME/Opatch/opatch apply -jdk $JAVA_HOME Note: Windows requires the -oop option addition to above command . $ORACLE_HOME/OPatch/opatch apply -oop
Verify the patch using
$ opatch lsinventory -jre $WLS_HOME/oracle_common/jdk/jre
WLS_HOME=/apps/bea14 in our case .