TRANSIENT SCHEDULER ATTACKS
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=113261
Printed Date: 18 Jul 2025 at 9:11am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: TRANSIENT SCHEDULER ATTACKS
Posted By: Skybuck
Subject: TRANSIENT SCHEDULER ATTACKS
Date Posted: 10 Jul 2025 at 10:58pm
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Discovery: https://www.microsoft.com/en-us/research/publication/enter-exit-page-fault-leak-testing-isolation-boundaries-for-microarchitectural-leaks/" rel="nofollow - 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" rel="nofollow - 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" rel="nofollow - 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" rel="nofollow - 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" rel="nofollow - 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 ?) |
Replies:
Posted By: Skybuck
Date Posted: 10 Jul 2025 at 11:01pm
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I find this confusing: Why are there two different B650 models of Steel Legend Wi-Fi motherboard ? Is one newer than the other ? Is it updated/improved ? Or bait and switch strategy ? Very strange: https://www.asrock.com/mb/compare.nl.asp?Models=B650%20Steel%20Legend%20WiFi,B650E%20Steel%20Legend%20WiFi" rel="nofollow - https://www.asrock.com/mb/compare.nl.asp?Models=B650%20Steel%20Legend%20WiFi,B650E%20Steel%20Legend%20WiFi |
Posted By: Skybuck
Date Posted: 10 Jul 2025 at 11:03pm
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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" rel="nofollow - https://www.asrock.com/mb/AMD/B650E%20Steel%20Legend%20WiFi/index.nl.asp#BIOS |
Posted By: Xaltar
Date Posted: 10 Jul 2025 at 11:12pm
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They have different chipsets, B650 and B650E. I found this link that explains the difference: https://www.corsair.com/us/en/explorer/gamer/gaming-pcs/b650-vs-b650e-which-chipset-should-you-choose/" rel="nofollow - https://www.corsair.com/us/en/explorer/gamer/gaming-pcs/b650-vs-b650e-which-chipset-should-you-choose/ Basically, the added E denotes differences in the PCIe faculties of the chipset. I like to think of the E standing for Enhanced. Hope this clarifies things  ------------- 
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