Microsoft Experts Warn That Windows Devices on New CPUs Can Corrupt Data

new CPUs corrupt data
Written by Emma Davis

Microsoft engineers have warned that devices running Windows 11 and Windows Server 2022 with new supported CPUs may “corrupt data” for users in some way.

While the company warns about the risk of data loss, it doesn’t specify exactly what customers can expect if they encounter this issue.

Let me remind you that we also reported that Microsoft Updates May Break Printing in Windows Server, and also that Microsoft warns the files may remain after the Windows PC reset.

The company said in a statement that the problem applies to Windows devices that support the latest Vector Advanced Encryption Standard (VAES) instruction set. Running on the latest hardware, these devices use AES-XTS or AES-GCM block cipher modes.

Microsoft assures that the issue has already been resolved in the previews and patches released on May 24 and June 14, 2022, and further data corruption will not occur. However, these updates can have a noticeable performance impact: after installing them, AES-based operations can run up to half as slow on systems running Windows Server 2022 and Windows 11.

Scenarios that are affected by performance degradation may include BitLocker, TLS (in particular load balancers), and disk throughput (especially for enterprise customers).

We have added new code paths in SymCrypt for the original release of Windows 11 and Windows Server 2022 to take advantage of VAES (Vectorized AES) instructions. SymCrypt is the core Windows cryptographic library. These instructions affect the Advanced Vector Extensions (AVX) registers for hardware with the latest supported processors.developers write

Users experiencing performance issues are advised to install the June 23, 2022 preview updates for Windows 11 and Windows Server 2022 or the July 12, 2022 security updates for Windows 11 and Windows Server 2022. Microsoft says these updates will restore original performance figures as well as help “prevent further damage.”

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About the author

Emma Davis

I'm writer and content manager (a short time ago completed a bachelor degree in Marketing from the Gustavus Adolphus College). For now, I have a deep drive to study cyber security.

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