Beware: Windows 11-ready CPUs with VAES "susceptible to data damage", full CPU list here

When Windows 11 was first announced, there was a lot of angst because Microsoft imposed stringent system requirements for it.

Only modern AMD and Intel microprocessors were supported.

It was set to provide better security support than previous generation CPUs, specifically Intel 7th Gen "Kaby Lake" and AMD Zen (Ryzen 1000) or older.

Microsoft discovered problems with the Vectorized AES (VAES) instruction on supported CPUs.

Such Windows 11 and Windows Server devices are "vulnerable to data damage." : Microsoft

The affected Windows devices:

AES XEX-based tweaked-codebook mode with ciphertext stealing (AES-XTS)

The affected Windows devices:

AES with Galois/Counter Mode (GCM) (AES-GCM)

The good news is that Microsoft has resolved the issue via previous Windows Updates KB5014746 and KB5014019

Users are expected to have performance impact on BitLocker, TLS, and also disk throughput upon installing the workaround updates

Performance degradation may occur in the following scenarios:

Transport Layer Security (TLS)
Disk throughput

You may find more details on Microsoft's official website where the issue is described under support article KB5017259

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