https://www.us-cert.gov/ncas/current-activity/2020/04/15/oracle-releases-april-2020-security-bulletin

https://www.oracle.com/security-alerts/cpuapr2020.html

Oracle has released its Critical Patch Update for April 2020 to address 397 vulnerabilities across multiple products. A remote attacker could exploit some of these vulnerabilities to take control of an affected system.  Corporate administrators should review the Oracle April 2020 Critical Patch Update and apply the necessary updates.