The MITRE CVE dictionary describes this issue as:
Double free vulnerability in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7.x and 1.8.x before 1.8.2 allows remote authenticated users to cause a denial of service (daemon crash) or possibly execute arbitrary code via a request associated with (1) renewal or (2) validation.
Find out more about CVE-2010-1320 from the
MITRE CVE dictionary dictionary and
Not vulnerable. This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 3, 4, or 5.