Microsoft Confirms Windows 11 Update Fails With Error 0x800f0922
ID: 5c6f61c5-e892-5697-ba45-158904cd7b09
STIX ID: report--5c6f61c5-e892-5697-ba45-158904cd7b09
Feed Name: cybersecurityNews.com
Microsoft confirmed that the May 2026 Windows 11 cumulative update KB5089549 can fail to install (error 0x800f0922 and related errors) when the EFI System Partition lacks sufficient free space, because the update adds Secure Boot certificates, a new SecureBoot folder and automation scripts; the vendor added the issue to the changelog, is rolling out fixes, and recommends administrators use the provided scripts and the Windows Release Health Dashboard to manage and monitor phased deployments.
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