CVE-2022-27191 (https://groups.google.com/g/golang-announce/c/-cp44ypCT5s): golang.org/x/crypto/ssh before 0.0.0-20220314234659-1baeb1ce4c0b in Go through 1.16.15 and 1.17.x through 1.17.8 allows an attacker to crash a server in certain circumstances involving AddHostKey.