More information about this security flaw is available in the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=2342880 Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
After checking the upstream commit bddaff32104aa1163c5787bce35b58fe7dc27e85, dhcp is not affected. Dhcp doesn't use the affected functionality. It doesn't call directly or indirectly the affected code from 'lib/isc/netmgr'.