The binary & source versions for MySQL Cluster 7.1.23 have now been made available at https://www.mysql.com/downloads/cluster/7.1.html#downloads (GPL version) or https://support.oracle.com/ (commercial version).
A description of all of the changes (fixes) that have gone into MySQL Cluster 7.1.23 (compared to 7.1.22) are available from the 7.1.23 Change log.