The new gTLDs (generic Top-level Domains) are the new domain name extensions that will come into the Internet world in the form of generic terms. As part of ICANN’s new program, the number of gTLDs will expand from two dozens to over 1,300 new names.
SSL certificate providers have previously approved certificates for Common Names / SANs, which included some of these new gTLDs. These names were commonly used as internal server names / intranets at that time.
With the approval of a new gTLD, names that are once internal only may now actually be a registered or an available domain name. Existing certificates may contain domain names which certificate owners are suddenly unauthorized to use, even if the certificates are used internally only in their environment. As such, SSL certificate providers will revoke these certificates. Certificate owners will be required to request for a new certificate to replace the existing one.