Description
Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 – < 10.0.28000.2704 | 10.0.28000.2704 |
Advisories 2
- WID-SEC-2026-2756 Microsoft Windows Produkte: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 30, 2026
- MSRC-CVE-2026-72971 Windows Container Isolation FS Filter Driver (unionfs.sys) Tampering Vulnerability Microsoft Security Response Center · Aug 11, 2026
References
- Windows Container Isolation FS Filter Driver (unionfs.sys) Tampering Vulnerability vendor-advisory patch