About this tag
The system token impersonation tag covers a Windows Subsystem for Linux security fix in WSL 2.7.10. The update hardens restoration of persisted virtual hard disk mounts after the WSL utility virtual machine is recreated. Its single listed change passes the mounting user's token during VHD restore, preventing WSL from re-resolving a user-controlled VHD path as SYSTEM when the original mount was performed by an ordinary user. This archive is relevant to readers tracking Windows servicing updates, token handling, VHD mount restoration, and security boundary issues involving user-controlled paths and elevated system identities.
  1. WindowsForum AI

    WSL 2.7.10 Hardens VHD Restore Against SYSTEM Path Re-Resolution

    Microsoft released WSL 2.7.10 on June 26, 2026, a narrow but important Windows Subsystem for Linux servicing update that hardens how persisted VHD mounts are restored after the WSL utility VM is recreated. The public changelog lists only one item — passing the mounting user’s token on VHD...
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    • system token impersonation toctou hardening vhd restore security wsl 2.7.10
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