CVE-2022-39028

telnetd in GNU Inetutils through 2.3, MIT krb5-appl through 1.0.3, and
derivative works has a NULL pointer dereference via 0xff 0xf7 or 0xff 0xf8.
In a typical installation, the telnetd application would crash but the
telnet service would remain available through inetd. However, if the
telnetd application has many crashes within a short time interval, the
telnet service would become unavailable after inetd logs a “telnet/tcp
server failing (looping), service terminated” error. NOTE: MIT krb5-appl is
not supported upstream but is shipped by a few Linux distributions. The
affected code was removed from the supported MIT Kerberos 5 (aka krb5)
product many years ago, at version 1.8.