> Even an exteremely brief search of the archives of this list would turn up > tons of similar questions, and the same answer every time -- Red Hat > backports security fixes to the stable version of packages in their > Enterprise distro. That's why, e.g., for it's entire 5 year supported life, > RHEL5 will be based on kernel 2.6.18. However the base kernel will be > heavily patched for security, driver upgrades, and new hardware support. > They treat all packages (including PHP) similarly. Red Hat now supports RHEL for 7 years after the release of each version.