Microsoft Confirms Windows 11 Bug That Can Consume Over 500GB of Storage Through Perm

[harlan4096]

Microsoft has confirmed a Windows 11 bug that causes the Capability Access Manager write-ahead log file to grow continuously without being compacted, which can lead to the use of over 500GB of drive space on affected systems.

The fix is included in update KB5095093, which contains builds 26200.8737 and 26100.8737. Users can install this update through the optional updates section of Windows Update or wait for it to be included in the July 2026 Patch Tuesday rollout.

The issue was documented by Windows Latest. Microsoft's release notes for KB5095093 state that the update "improves disk space usage for the CapabilityAccessManager.db-wal file.

What Is Causing The Windows 11 Storage Bug

The Capability Access Manager is a component of Windows 11 responsible for app permissions. It controls access to privacy-sensitive features such as the camera, microphone, location, contacts, and screen capture, and logs when apps request or use these capabilities.

The issue isn’t with the permission system itself. Instead, it relates to the CapabilityAccessManager.db-wal file, which is the write-ahead log for the database. Normally, this log file grows during regular use but should be merged or compacted back into the main database.

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