'Kernel memory leaking' Intel processor design flaw forces Linux, Windows redesign

Microsoft has developed a new way to test for side channel attacks:
https://www.microsoft.com/en-us/res...tion-boundaries-for-microarchitectural-leaks/

This already led to new AMD vulnerabilities being discovered:
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7029.html
(Microcode/BIOS and OS updates are needed.)

In the news:
AMD warns of new Meltdown, Spectre-like bugs affecting CPUs

https://www.theregister.com/2025/07/09/amd_tsa_side_channel/