Tor 0.4.7.x before 0.4.7.8 allows a denial of service via the wedging of RTT estimation.
https://security.gentoo.org/glsa/202305-11
https://security-tracker.debian.org/tracker/CVE-2022-33903
https://lists.torproject.org/pipermail/tor-announce/2022-June/000242.html