Recommended patching requirement for database versions below 12.2

What we are announcing

Oracle Database versions 11.1.0.7, 11.2.0.3 & 12.1.0.1 are strongly recommended to be patched to the patchset/PSU levels mentioned below before June 2019 to resolve potential future issues in terms of interoperability of dblinks. No action needed if you are running database releases/versions 12.2, 12.1.0.2 or 11.2.0.4. If you are still using 10.2 or earlier releases and using dblinks with later database releases, this note also applies to you.

The interoperability of database clients with database servers is not impacted.

(Based on customer feedback, we are currently evaluating the need and feasibility of providing a similar patch for 10.2.0.5 and this note will be updated with that information at a later time.)