More information about this security flaw is available in the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=2373097 Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
This should be now fixed in rawhide, not in F42 as it seems to have a low impact (users are not expected to compile or use untrusted terminfos).