Need details on the Ubuntu version 18 and 20 recent security patches released [closed]
Solution 1:
https://ubuntu.com/security/cve contains all the information about CVEs. You can look these up by each CVE or each package to get the list of certain CVEs that are marked as still affecting a release and are unpatched.
Also watch https://ubuntu.com/security/notices for notices of security updates being released.
Wherever you're getting your 'rpm' information is not including the Ubuntu security patching processes.
However, without more information from you about which CVEs you're looking at specifically, it's impossible to give you a better answer than this.