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Microsoft Windows 11 KB5089549 cumulative update

Security Patch Release
First reported
Last updated
Happening score
H score 19
1 unique sources, 1 articles

Summary

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Microsoft's KB5089549 Windows 11 security update is failing to install on some systems, forcing affected devices to roll back during reboot. The problem is tied to a nearly full EFI System Partition (ESP) and can surface as 0x800f0922, creating update failure risk for devices with 10 MB or less free space. Microsoft is advising Known Issue Rollback and a Group Policy mitigation while it works on a fix.

Related Happenings

Microsoft Windows Server 2016 KB5094122 installation failures resolved

Service Disruption
H score1 First: 18.06.2026 13:14 Last: 18.06.2026 13:14 Sources 1

About this happening: Microsoft resolved a **Windows Server 2016** update-installation failure that blocked **June 2026 security updates** on some unpatched servers. Affected devices could hit **0x8007...

Open Happening

Microsoft Windows Server 2025 and Windows 11 23H2 BitLocker recovery fix

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About this happening: Microsoft shipped **KB5094125** for **Windows Server 2025** and **KB5093998** for **Windows 11 23H2** to fix a **BitLocker recovery** bug tied to the **April 2026 security update*...

Open Happening

Microsoft Windows Update installation failures on upgraded Windows 11 PCs

Service Disruption
H score1 First: 10.06.2026 14:33 Last: 10.06.2026 14:33 Sources 1

About this happening: **Microsoft Windows Update** is failing on a **small percentage of upgraded Windows 11 PCs**, blocking **June 2026 cumulative updates** and producing **0x80073712** or **0x800f099...

Open Happening

Windows 11 update installation fix (KB5089573)

Security Patch Release
H score14 First: 01.06.2026 13:59 Last: 01.06.2026 13:59 Sources 1

About this happening: **Microsoft** resolved the **Windows 11 KB5089549** installation failure with **KB5089573**, fixing update rollbacks on devices with limited **EFI System Partition (ESP)** space....

Open Happening

Microsoft Windows Known Issue Rollback guidance for KB5089549

Advisory/Mitigation
H score14 First: 01.06.2026 13:59 Last: 01.06.2026 13:59 Sources 1

About this happening: Microsoft's **Known Issue Rollback** guidance gives **Windows 11** users and admins a workaround for **KB5089549** installation failures caused by low **EFI System Partition (ESP)...

Open Happening

Timeline

  1. 18.05.2026 11:33 2 articles · 1mo ago

    Microsoft confirms KB5089549 Windows 11 install rollback issue

    Initial Disclosure

    Microsoft confirmed that the Windows 11 security update KB5089549 can fail to install on devices with 10 MB or less free space on the EFI System Partition (ESP), triggering 0x800f0922 errors and an automatic rollback during the reboot phase; affected devices may show the "Something didn't go as planned. Undoing changes." message, and Microsoft recommends Known Issue Rollback or a Group Policy mitigation for managed environments.

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