%%IMAGE%%:<version> (from 12 onwards), %%IMAGE%%:<version>-oracle and %%IMAGE%%:<version>-oraclelinux8
Starting with openjdk:12 the default image as well as the -oracle and -oraclelinux8 variants are based on the official Oracle Linux 8 image which is provided under the GPLv2 as per the Oracle Linux End User Agreement (EULA).
The -oraclelinux7 variants are based on the official Oracle Linux 7 image which is provided under the GPLv2 as per the Oracle Linux End User Agreement (EULA).
The OpenJDK binaries are built by Oracle and are sourced from the OpenJDK community. These binaries are licensed under the GPLv2 with the Classpath Exception.