Affected: golang.org/x/crypto/ssh, Red Hat Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4.22, Red Hat RHEM 1.0 for RHEL 9, Red Hat RHEM 1.1 for RHEL 10, Red Hat RHEM 1.1 for RHEL 9, Red Hat external secrets operator for Red Hat OpenShift 1.1 and 54 more

SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.