How to disable Downfall pHow to disable Downfall patch and Meltdown/Spectre patch together?atch and Meltdown/Spectre patch together?

林沐雨 10 Reputation points
2023-08-30T04:00:43.4966667+00:00

As you know, MS just release a method to disable Downfall patch

https://support.microsoft.com/en-us/topic/kb5029778-how-to-manage-the-vulnerability-associated-with-cve-2022-40982-d461157c-0411-4a91-9fc5-9b29e0fe2782

a

Registry location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
Value name: FeatureSettingsOverride
Value type: REG_DWORD
Value data: 0x2000000 (hex)

and I set this  value to 3 to disable Meltdown/Spectre patch 

To disable mitigations for CVE-2017-5715 (Spectre Variant 2) and CVE-2017-5754 (Meltdown)

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverride /t REG_DWORD /d 3 /f

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverrideMask /t REG_DWORD /d 3 /f

Note: Setting FeatureSettingsOverrideMask to 3 is accurate for both the "enable" and "disable" settings.

how I can disable them together? thank you

Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
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  1. Ian Xue (Shanghai Wicresoft Co., Ltd.) 34,191 Reputation points Microsoft Vendor
    2023-09-14T09:30:42.53+00:00

    Hi,

    It seems like a bit-flag value. Please see if set the data of the registry value FeatureSettingsOverride to 0x2000003 can disable both patches.

    Best Regards,

    Ian Xue


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