Microsoft has released an optional update addressing a significant storage problem affecting Windows 11 systems. The CapabilityAccessManager.db-wal file, which manages application permissions, was unexpectedly consuming massive amounts of disk space on affected machines, with some users reporting the file growing to between 12 and 500 gigabytes. The issue rendered several devices functionally unusable due to storage capacity exhaustion.

The June 2026 update (KB5095093) resolves the problem by improving disk usage for the affected file. The underlying cause appears to be repeated logging of permission access requests and privacy control events that accumulated unchecked over time. Affected users can remedy the issue by navigating to their Settings menu, accessing Windows Update, selecting Advanced options, and installing the optional June 2026 update.