KB5058379: This update applies improvements to SBAT for the detection of Linux systems.

May 13, 2025—KB5058379 (OS Builds 19044.5854 and 19045.5854)

This security update includes quality improvements that were a part of update KB5055612 (released April 22, 2025). Below is a summary of the key issues that this update addresses when you install this KB. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

• [Secure Boot Advanced Targeting (SBAT) and Linux Extensible Firmware Interface (EFI)] This update applies improvements to SBAT for the detection of Linux systems.

If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.

For more information about security vulnerabilities, please refer to the new Security Update Guide website and the May 2025 Security Updates.