There is none, nada, zip, zero. CentOS-x is NOT a Red Hat®, Inc. or Fedora™ Core affiliated product or project.
The CentOS Project is not affiliated with or supported by Red Hat®, Inc or the Fedora™ Project.
CentOS-x is NOT supported in any way by Red Hat®, Inc. or the Fedora™ Project.
CentOS-x is NOT Red Hat® Linux, it is NOT Fedora™ Core. It is NOT Red Hat® Enterprise Linux. It is NOT RHEL. CentOS-x does NOT contain Red Hat® Linux, Fedora™ Core, or Red Hat® Enterprise Linux.
CentOS is built from publicly available open source SRPMS. See About CentOS if you have any questions.
