No details yet, but URL says affected versions are: Oracle Java SE, versions 7u343, 8u333, 11.0.15.1, 17.0.3.1, 18.0.1.1
These issues have been addressed, as applicable, in the following releases: 7u351, 8u342, 11.0.16, 13.0.12, 15.0.8, 17.0.4, and 18.0.2