After you've installed Oracle Blockchain Platform Enterprise Edition you can find patches for it on the Oracle Support site.

Patch set 3 is available for Oracle Blockchain Platform Enterprise Edition. The change log for the patch as well as prerequisites and instructions are included in the readme file that comes with the patch.

1. Go to the My Oracle Support portal https://support.oracle.com/portal/, and log in.
2. Select the Patches and Updates tab.
3. Search for the patch by name or number (37471214). Download and extract the patch.
4. Follow the instructions in the readme file to install the patch.
5. After the patch is applied, restart any existing Oracle Blockchain Platform instances. Because the container registry images are updated by the patch, any instances created after patching will use the updated images.