If the Catalina fixes have already been back-ported to Mojave, please link to the Apple security announcement. Where are the Mojave fixes for CVE-2019-8745 and

If the Catalina fixes have already been back-ported to Mojave, please link to the Apple security announcement. Where are the Mojave fixes for CVE-2019-8745 and CVE-2019-8769 for example? If they're not available, my point stands.