Red Hat Enterprise Linux: An update for ntp is now available for Red Hat Enterprise Linux 6.7 Extended
Update Support.

Red Hat Product Security has rated this update as having a security impact of
Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a
detailed severity rating, is available for each vulnerability from the CVE
link(s) in the References section.
CVE-2015-7979, CVE-2016-1547, CVE-2016-1548, CVE-2016-1550, CVE-2016-2518