The MITRE CVE dictionary describes this issue as:
The do_standalone function in the MIT krb5 KDC database propagation daemon (kpropd) in Kerberos 1.7, 1.8, and 1.9, when running in standalone mode, does not properly handle when a worker child process "exits abnormally," which allows remote attackers to cause a denial of service (listening process termination, no new connections, and lack of updates in slave KVC) via unspecified vectors.
Find out more about CVE-2010-4022 from the
MITRE CVE dictionary dictionary and
This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 4 or 5 as the flaw was introduced in a later version of MIT krb5 (1.7).