• KB5034441 and KB5034440

    Posted on January 23, 2024 at 16:36 CST by • Comment in the Forums

    I’ve been getting some emails regarding our coverage of the Windows Recovery partition problem. One question was whether this applies to Windows 10 only, or both Windows 10 and 11.

    It could be both.

    There are two specific Microsoft knowledge base posts about this  — KB5034441 for Windows 10 and KB5034440 for Windows 11. Both refer to CVE-2024-20666, BitLocker Security Feature Bypass Vulnerability.

    As I have previously noted, the problem showed up rapidly on Windows 10 PCs and, so far, rarely on Windows 11 PCs. That accounts for our slightly one-sided coverage. Also note that KB5034440 only calls out Windows 11 21H2. For Windows 11 22H2 and 23H2, the vulnerability noted in  CVE-2024-20666 is being patched as part of the cumulative windows update of KB5034123. We’ll have more on these nuances in next week’s alert.

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