SRG-OS-000437-GPOS-00194
The operating system must remove all software components after updated versions have been installed.
Canonical Source
SV-203755r958936_rule ( from General Purpose Operating System Security Requirements Guide )Description
Previous versions of software components that are not removed from the information system after updates have been installed may be exploited by adversaries. Some information technology products may remove older versions of software automatically from the information system.