Apache HTTP Server mod_cluster before version httpd 2.4.23 is vulnerable to an Improper Input Validation in the protocol parsing logic in the load balancer resulting in a Segmentation Fault in the serving httpd process.
https://security.netapp.com/advisory/ntap-20180601-0005/
https://bugzilla.redhat.com/show_bug.cgi?id=1387605
https://access.redhat.com/errata/RHSA-2017:0194
https://access.redhat.com/errata/RHSA-2017:0193