When locking the screen the application menu bar and the window list at the bottom of the screen are visible. The user has the ability to kill open windows and also start applications when the machine is locked.
This issue was only ever present in Centos 8 Stream, in particular in gnome-shell-3.32.2-39.el8.x86_64 . No released RHEL version was ever affected by this.
This issue was introduced as part of backporting the feature in https://bugzilla.redhat.com/show_bug.cgi?id=1651378 .
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):