Microsoft says Windows 11 encryption can corrupt data

    Microsoft has detailed a critical bug in Windows 11 and Windows Server 2022. Due to the issues outlined in Knowledge Base (KB) article KB5017259 (opens in a new tab), it says users of its latest desktop operating system may have data corruption. There appears to be a vulnerability in the operation of the new data encryption hardware accelerator, which is supported by the latest AMD and Intel processors and used by applications such as BitLocker. Thankfully, fixes are available for both preview and release versions of Windows 11 and Windows Server 2022.

    (Image credit: Microsoft)

    Microsoft says affected systems will experience the issues described in KB5017259 if they have a processor that supports the latest Vector Advanced Encryption Standard (AES) (VAES) and specifically one of the following extensions:

    • Modified cipherbook mode based on AES XEX with ciphertext stealing (AES-XTS)
    • AES with Galois Mode/Counter (GCM) (AES-GCM)

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