The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.
https://www.starwindsoftware.com/security/sw-20220817-0004/
https://www.oracle.com/security-alerts/cpujul2022.html
https://web.mit.edu/kerberos/advisories/
https://security.netapp.com/advisory/ntap-20210923-0002/
https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
https://github.com/krb5/krb5/releases
https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49