The following FASTBUGS have been uploaded to

http://ftp.scientificlinux.org/linux/scientific/6x/i386/updates/fastbugs/
http://ftp.scientificlinux.org/linux/scientific/6x/x86_64/updates/fastbugs/

i386:
microcode_ctl-1.17-25.7.el6_9.i686.rpm

x86_64:
microcode_ctl-1.17-25.7.el6_9.x86_64.rpm