[German]Brief information for users of Windows 11 22H2. Microsoft has distributed the Secure Boot DBX update KB5012170 probably again on December 6/7, 2022 for Windows 11 version 22H2. This update had been released on Patchday, August 9, 2022 to fix issues in Secure Boot DBX. However, this update caused significant problems with Bitlocker for some users, up to systems no longer booting. There may also be problems with the current update.
Secure Boot DBX Update KB5012170
I had reported on Patchday, August 9, 2022, in the blog post Windows Security Update KB5012170 for Secure Boot DBX (August 9, 2022) about update KB5012170. It is a security update for the Secure Boot module, which can be used by Windows on UEFI machines.
It is intended to fix a vulnerability that allows security features to be bypassed during secure boot. An attacker who successfully exploited this vulnerability could bypass the secure boot process and load untrusted software. The update affects all versions of Windows that are still in support.
Shortly after the security update was released, however, there was increased evidence of real problems here on the blog. The security update for the Secure Boot Module, which is supposed to prevent exploitation of vulnerabilities, causes some users to request the Bitlocker key at boot time. Others have installation errors, and for some users the screen remains dark. I had reported about this in the blog post Update KB5012170 for Secure Boot DBX causes Bitlocker issues. In addition, Microsoft lists a number of known issues in the KB5012170 support post.
KB5012170 now also for Windows 11 22H2
When the update KB5012170 was released in August 2022, Windows 11 22H2 was not yet generally released. Now I stumbled across it at the colleagues of deskmodder.de that some users of Windows 11 22H2 have received the Secure Boot DBX update KB5012170 as of December 6/7, 2022. In the deskmodder.de forum, one user complains that an update is aborted with error 0x800f0922.
WINDOWS 11:2022-08 Security Update for Windows 11 22H2 x64-based Systems(KB5012170), Installation Error-0x800f0922
Yesterday evening (12/07/2022) this security update was distributed via Windows Update. Installation, even the manual version (.msu) was aborted with the error message "Installation error – 0x800f0922".
Other error messages:
Installation error: The installation of the following update failed with error 1): 2022-08 Security Update for Windows 11 22H2 for x64-based Systems (KB5012170)
– 2 x 0x800f0922
– 6 x 0x8024200B
The error 0x800f0922 during installation has been confirmed by Microsoft (see the Known Issues of KB5012170, or check this hint on German site deskmodder.de) – Microsoft advises to update the UEFI. In the course of the thread at deskmodder.de, other users (DK2000( – and also the operator of deskmodder.de for his installation – confirm that this update has been rolled out. Anyone else from the readership who received this update to Windows 11 22H2? Were there any problems in connection with the update?
Windows Security Update KB5012170 for Secure Boot DBX (August 9, 2022)
Update KB5012170 for Secure Boot DBX causes Bitlocker issues
Windows Update KB5012170 (Secure Boot DBX) re-released for WSUS (Oct. 2022)
Confirmed: Secure Boot DBX Update KB5012170 causes installation trouble (Error 0x800F0922)
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