Microsoft has warned that some users may be affected by issues related to its encryption capabilities combined with CPUs with Vector Advanced Encryption Standard (VAES) instructions. This problem may result in “data corruption”. This issue affects Windows 11 and Windows Server 2022.
according to a Published on Microsoft’s website (opens in new tab), services that may be affected include Bitlocker, Microsoft’s full-volume encryption feature. It uses the AES instruction set supported by modern CPUs, specifically Adjusted Codebook Mode with Ciphertext Stealing (AES-XTS) based on AES XEX and AES with Galois/Counter Mode (GCM) (AES-GCM).
The list of affected CPUs has not been announced, but Intel 10th Gen and newer CPUs and AMD Ryzen 5000 and newer CPUs are believed to be affected. It is believed that the problem is caused by Windows code rather than a hardware problem.
beeping computer (opens in new tab) Microsoft has been aware of the issue for some time, and released preview and security versions in May and June, the report said. These temporary patches cause performance degradation, but there is good news. According to Microsoft Support, “Performance will resume after installing the June 23, 2022 Preview or July 12, 2022 Security release”. So if you’re using Bitlocker or other Microsoft disk encryption, you should update your Windows now (if you haven’t already).
The cause of the problem is described as follows: “We have added new code paths for Windows 11 (original) and Windows Server 2022 versions of SymCrypt to utilize VAES (Vectorized AES) instructions. SymCrypt is the core cryptographic library in Windows. These instructions do Advanced Vector Extensions (AVX) registers for hardware with the latest supported processors.”
The Windows 11 launch was largely successful. But like any widely installed operating system, with a basically limitless mix of hardware and software, problems will always surface.Update issues don’t go away (opens in new tab)And Windows Defender is known to affect Intel CPU performance (opens in new tab).
There is always Linux.With the success of Steam Decks, it’s always been friendlier (opens in new tab).