+++ This bug was initially created as a clone of Bug #1574968 +++ The updated ucode needs to be delivered for Broadwell EP/EX CPU models to mitigate Spectre vulnerability. Broadwell EP/EX CPUs need updated microcode update sequence so this is blocker by bz1574967.
Since RHEL-5 doesn't support Broadwell EP/EX CPUs I'm closing this bug.