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CPU microcode update for Spectre/Meltdown variant...

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3 months 2 weeks ago - 3 months 2 weeks ago #282 by Dynastar
Update from August 21, 2018 for Win 10/LTSB & (Server 2016 for RS3/RS4) only :

Summary
Intel recently announced that they have completed their validations and started to release microcode for recent CPU platforms related to Spectre Variant 3a (CVE-2018-3640: "Rogue System Register Read (RSRE)"), Spectre Variant 4 (CVE-2018-3639: "Speculative Store Bypass (SSB)"), L1TF (CVE-2018-3615, CVE-2018-3620, CVE-2018-3646: "L1 Terminal Fault"). In addition to microcode updates previously released in KBXXXX to address Spectre Variant 2 (CVE 2017-5715: "Branch Target Injection"), this update also includes microcode updates from Intel CPUs.

Since update from July 20 & 21, 2018, Sandy bridge CPUs are also now supported.

RTM aka v 1507 : KB4346088
Info :
support.microsoft.com/en-gb/help/4346088...el-microcode-updates
Update :
www.catalog.update.microsoft.com/search.aspx?q=4346088

v 1607 aka RS1 : KB4346087
Info :
support.microsoft.com/en-gb/help/4346087...el-microcode-updates
Update :
www.catalog.update.microsoft.com/Search.aspx?q=KB4346087

v 1703 aka RS2 : KB4346086
Info :
support.microsoft.com/en-gb/help/4346086...el-microcode-updates
Update :
www.catalog.update.microsoft.com/search.aspx?q=4346086

v 1709 aka RS3 : KB4346085
Info :
support.microsoft.com/en-gb/help/4346085...el-microcode-updates
Update :
www.catalog.update.microsoft.com/search.aspx?q=4346085

v 1803 aka RS4 : KB4346084
Info :
support.microsoft.com/en-gb/help/4346084...el-microcode-updates
Update :
www.catalog.update.microsoft.com/search.aspx?q=4346084

NB :
Ce type de protection est uniquement de manière logicielle afin de protéger le Kernel de votre OS respectif.
Il est évident, qu'une mise à jour de votre bios correspondante, vous protégera complétement, si toutefois, elle existe réellement, pour votre matériel, de manière physique pour cette dernière, qui, associée avec la mise à jour correspondante logicielle, vous garantira, la meilleure protection possible à ce sujet.

Cdt

Certified IT / Donator / Staff member / Global moderator / Advisor
Last edit: 3 months 2 weeks ago by Dynastar. Reason: Fixed mistake for download link for KB for RS1 & RS4-(Thanks to erpster96)
The following user(s) said Thank You: akks1981

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3 months 2 weeks ago - 3 months 2 weeks ago #288 by erpster96
Dynastar

there is some confusion as to whether some of the new microcode updates you mention are the latest or not.

KB4346084 is the latest version for Win10 v1803, not KB4100347. KB4100347 may have a new date from MS update catalog but it is the same patch released in July - Microsoft only changed the date for this.

https://www.askwoody.com/2018/patch-lady-microcode-confusion/

the actual KB4346084 updates contain a digital signature of Aug. 8, 2018 while the actual KB4100347 v2 updates contain a digital signature of July 12, 2018.
Last edit: 3 months 2 weeks ago by erpster96.

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3 months 2 weeks ago - 3 months 2 weeks ago #290 by Dynastar
Yes, sorry.
I made a mistake about the KB for RS4 when posting.
As the first link was effectively well for KB4346084 for RS4 but not the second download link placed below.
Btw, for RS1 also :/ KB4346087
(non sens for sure...)
I forgot to read myself again after posting...
Thanks for letting me know.
My bad :p

Whereas you can check by this little application to see the actual status of your cpu :
www.grc.com/inspectre.htm

Best regards

Certified IT / Donator / Staff member / Global moderator / Advisor
Last edit: 3 months 2 weeks ago by Dynastar.

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3 months 1 week ago #336 by erpster96
thanks Dynastar.

while the new CPU microcode Aug. 2018 updates for Spectre/Meltdown were recently released, Microsoft has also removed the links to the older July 2018 Intel CPU microcode updates (like KB4100347 2018-07) although some Win10 v1803 RS4 users who have AMD CPUs instead of Intel CPUs are actually receiving the KB4100347 update as noted here:
https://www.askwoody.com/2018/patch-lady-whats-up-with-the-microcode-updates/
and here:
https://www.askwoody.com/2018/mind-boggled-the-meltdown-spectre-microcode-patches/

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3 months 2 days ago #350 by santec92
salut
j'ai essayer de mettre a jours mon bios avec UBU (µc24>µc25) cela c'est solder par un écran noir au boot , heureusement je disposai de la puces original , donc si MS propose des µcode logiciel , pas sur qu'il soit applicable pour tout les CM

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2 months 3 weeks ago #376 by erpster96
Dynastar

Microsoft has recently posted revised KB4100347 (v3), KB4090007 (v5), KB4091663 (v5), KB4091664 (v5) and KB4091666 (v4) updates dated September 13, 2018. these new updates seem to supersede the updates from KB4346084 to KB4346088.

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