> CVE-2026-72971 Windows Container Isolation FS Filter Driver (unionfs.sys) Tampering Vulnerability

[SOURCE] Microsoft Security Update Guide [DATE: 11/08/2026 14:00] [LANGUAGE: EN]

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.

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