For Oracle Database and Grid Infrastructure: “Release Schedule of Current Database Releases” in My Oracle Support Note 742060.1 "Primary Note for Database Proactive Patch Program" in My Oracle Support Note 888.1 "Oracle Database 19c Important Recommended One-off Patches" in My Oracle Support Note 555.1 For engineered systems (Exadata Database Machine and Zero Data Loss Recovery Appliance): "Exadata Database Machine and Exadata Storage Server Supported Versions" in My Oracle Support Note 888828.1 “Exadata Critical Issues” in My Oracle Support Note 1270094.1 "Oracle Exadata: Exadata and Linux Important Recommended Fixes" in My Oracle Support Note 556.1 "Oracle Exadata Database Machine Exachk" in My Oracle Support Note 1070954.1 For non-engineered systems: "Autonomous Health Framework (AHF) - Including TFA and Orachk/Exachk" in My Oracle Support Note 2550798.1