TRANSIENT SCHEDULER ATTACKS

Discovery:
https://www.microsoft.com/en-us/research/publication/enter-exit-page-fault-leak-testing-isolation-boundaries-for-microarchitectural-leaks/

Publication:
https://www.microsoft.com/en-us/research/wp-content/uploads/2025/07/Enter-Exit-SP26.pdf

AMD Report:
https://www.amd.com/content/dam/amd/en/documents/resources/bulletin/technical-guidance-for-mitigating-transient-scheduler-attacks.pdf

AMD Processors affected:
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7029.html

My SuperPC 2023 on which I would like to run blockchains sometimes may need to be protected agains this.

Assuming this is my motherboard:
https://www.asrock.com/mb/AMD/B650E%20Steel%20Legend%20WiFi/index.nl.asp#BIOS

The latest BIOS seems to be:

"Update AGESA to ComboAM5 1.2.0.3e Patch A for upcoming CPU compatibility."

AMD claims mitigation are in versions:

ComboAM5PI 1.2.0.3 + OS Updates (2025-01-08)   
ComboAM5PI 1.0.0.a + OS Updates (2025-01-14)   
ComboAM5PI 1.1.0.3c+ OS Updates (2025-01-27)

Which Windows 11 updates/patches would be necessary ? This remains unexplained.

Is it already fixed in Windows 11 ?

Can ASRock confirm these bios updates contain the fixes necessary to protect the processor against exploitation ?

What will the performance impact on the system ?

(Also what is the quality of these bios updates, any risks of components failing, like soundchips, harddisk support, ssd support, etc ?)

Do both versions share the same bios ? Seems so...

Apperently I have the second one which came with the graphics card holder.

The first/left one does not seem to have it:

Second one seems to have same link to bios page as previously posted in original posting:
https://www.asrock.com/mb/AMD/B650E%20Steel%20Legend%20WiFi/index.nl.asp#BIOS