Windows 11 / Intelligence workspace
Snapshot · 2026-09-15
IssuesKB5124008Evidence
Windows update intelligence

Plan9 host folders unavailable in Linux VMs

Host folders may be inaccessible in HCS-managed Linux VMs using Plan9.

ResolvedC3 · Microsoft confirmedMajor impactSnapshot checked 2026-09-15

Does this match your environment?

Windows scope
24H2 / 25H2
Architecture
Unknown — not universal
App / driver
WSL / Claude Cowork
Conditions
Plan9 host sharing; standard Hyper-V VMs without Plan9 are excluded.

A matching version is only a starting point. This page does not diagnose an individual device.

Evidence & current resolution

Microsoft lists this scope as resolved on 2026-09-14. Resolving update: KB5129195.

Microsoft official evidence
Evidence ID
official-plan9-shared-folders
Source groups
1 · official publication
Evidence basis
Manually reviewed public source; no independent device test
Evidence permalink

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Recorded timeline

2026-09-08

Originating update released

KB5124008
2026-09-14

Official resolution recorded

KB5129195

2026-09-15

Snapshot reviewed

Added to this curated collection. Earlier acknowledgement time was not independently captured.

Follow official guidance for your environment. We do not provide automatic rollback or security-disable actions.