attack vector is local; attack complexity is high; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
see table below
Classified as
CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'))
Affected Products, Subsystems & Sectors
Vendor
Product
Affected Versions
Patch Status
Microsoft
Windows 11 (version 23H2)
Microsoft
Windows 11 (version 24H2)
Microsoft
Windows 11 (version 25H2)
Microsoft
Windows 11 (version 26H1)
Microsoft
Windows Server 2025
Microsoft
Windows Server 2022
Microsoft
Windows 11 Version 26H2
Subsystems
OT Supporting Infrastructure
Sectors
All Sectors
What to Know
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
What to Do
Monitor Microsoft's web page for any future patch releases.