Tor relays before version 0.4.8.10 have a high severity issue in conflux circuit building. Recommended to immediately upgrade the packages in gentoo and drop affected versions. See: https://forum.torproject.org/t/security-release-0-4-8-10/10536
Created tor tracking bugs for this issue: Affects: epel-all [bug 2253846] Affects: fedora-all [bug 2253847]