Windows Unplugged

Summary:  

Intel Processor(CPU) microcode update for Windows 10 Version 20H2 addressing multiple security vulnerabilities

Comments:

• Windows 10 Version 20H2 Microcode Update were released on September 1 2020(KB4558130)
  • For specific details – see KB article – KB4589212
• This Intel Microcode update for Windows 10 Version 20H2 address 7 security vulnerabilities
  • CVE-2018-12126 Microarchitectural Store Buffer Data Sampling (MSBDS)
  • CVE-2018-12127 Microarchitectural Load Port Data Sampling (MLPDS)
  • CVE-2018-12130 Microarchitectural Fill Buffer Data Sampling (MFBDS)
  • CVE-2019-11091 Microarchitectural Data Sampling Uncacheable Memory (MDSUM)
  • CVE-2020-8695 Intel® Running Average Power Limit (RAPL) Interface
  • CVE-2020-8696 Vector Register Sampling active
  • CVE-2020-8698 Fast store forward predictor
• Windows 10 Version 20H2 Intel microcode updates with few exceptions are normally stand-alone updates and currently only available in the Microsoft Catalog.
  • A few Intel processors on devices running Windows 10 20H2(and 2004) will receive these updates via Windows Update.
    • To determine if the microcode update will be available in Windows Update for your CPU see the KB article and reference Footnote #2. CPU’s capable of updating microcode via Windows Update are shown in the KB article with a superscripted ‘2’ in the CPU code name field(first column) in the KB table of CPU’s
• This Microcode update includes previous released microcode updates for applicable CPU’s
• Applicable to Windows 10 20H2 and for the specific Intel CPU’s shown in the Knowledge Base article

How to Obtain:

• Microsoft Catalog
  • http://www.catalog.update.microsoft.com/Search.aspx?q=KB4589212
  • Note: This update is available for Windows 10 Version 20H2 different architectures (x64, x86, and Server 2004).  If downloading, ensure the correct Win10 20H2 file is chosen.

Additional information:

• Microsoft KB article _ KB4589212
  • KB4589212 Intel microcode updates
• Windows 10 Forums Article KB4589212 Intel Microcode Updates Windows 10 2004 and 20H2 Nov. 10
  • KB4589212 Intel Microcode Updates Windows 10 2004 and 20H2 Nov. 10
• EdTittle.com Intel Microcode Update Blog Article
  • KB4589212 Offers Intel Microcode Updates
• Windows 10 Bleeping Computer Article (Editor Note: In-depth Technical Article; Includes a link for CPU identification software)
  • Windows 10 Intel microcode released to fix new CPU security bugs

Revisions:

Nov 10 2020: Initial Draft

Nov 11 2020: Original Publish Date

Nov 14 2020: Added 3 more links in Additional Information Section