Intel committed to delivering all fixes by the end of the month. Any requests for information about missing microcode, microcode orders, etc. short of then are premature and a waste of everyone's time.
Intel Customer Support is not going to be able to provide you with any better answers; all they can do it point you to the primary web page.
Hi Scot, thank for your information.
Is it possible to clarify if the microcode update released at 1/8/2018 (https://downloadcenter.intel.com/download/27431/Linux-Processor-Microcode-Data-File?product=873) contains the Spectre and Meltdown patches ?
As I can understand not all processors listed in 1/8/2018 microcode have updated microcode for Spectre and Meltdown.
Yes, but not for all processors (basically a useless answer, I know).
Is there an accurate OFFICIAL processor model list with which Microcode has been patched and which not, to stop making speculations ...?
Everything is detailed on the main page: Facts about The New Security Research Findings and Intel Products. If the information isn't there or isn't linked from there (or isn't there in the form you want), it isn't available.
[Edit: I know that a by-model list isn't provided. Know that you can use the string names for each family to search for specific models in that family at Intel® Product Specifications (ark.intel.com).
Well Intel decided to release a decent report at February 12 2018 that states that the microcode update for the Sandy Bridge desktop processors with CPUID 206A7 that includes the following Desktop/Mobile processors:
Intel® Core™ i3-21xx/23xx-T/M/E/UE Processor
Intel® Core™ i5-23xx/24xx/25xx-T/S/M/K Processor
Intel® Core™ i7-2xxx-S/K/M/QM/LE/UE/QE Processor
Intel® Core™ i7-29xxXM Extreme Processor
Intel® Celeron® Desktop G4xx, G5xx Processor
Intel® Celeron® Mobile 8xx, B8xx Processor
Intel® Pentium® Desktop 350, G6xx, G6xxT, G8xx Processor
Intel® Pentium® Mobile 9xx, B9xx Processo
Is for the moment at Pre-Beta stage.
Thank you for posting this information.