More information about this security flaw is available in the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=2345857 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.
have not found relevant patch for grub to be able to say whether radare2 is affected or not. Hash or busted ;)