Windows devices that support the newest VAES instruction set might be susceptible to data damage

Since the official launch of Microsoft’s Windows 11 operating system last year, many users have not been confident in its compatibility and stability. There have been cases of performance degradation on the AMD platform before, and now the new version of Windows 11 has given everyone a whole mess. This version of the system may lose user data.

Microsoft said on their official website that the latest versions of Windows 11 and Windows Server 2022 have the risk of losing data, which comes from a bug in the encryption function. Some devices that support VAES (Vector Advanced Encryption Standard) instructions to accelerate data encryption have this problem, so users are advised to update the July 2022 security patch as soon as possible.

Windows 11 Insider Preview Build 25120
This VAES instruction belongs to the AVX-512 instruction set. At present, the devices that support this kind of instruction set are mainly equipped with Intel Ice Lake, Tiger Lake, Rocket Lake, and Alder Lake architecture CPUs, that is, computers and servers that are relatively new in recent years.

Microsoft also mentioned that the problem came from the SymCrypt code base, which caused the Windows bug, but these codes were actually added to Windows 10 and Windows Server 2019. There is no report of similar problems, and after installing this security patch, the VAES function will be completely turned off, which will reduce the system performance.