Weblogic Patching

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 .