CVE-2026-50428

Microsoft · Published July 14, 2026

7.1

CVSS v3.1

HIGH

Patch availableGet patch

Description

Windows Container Isolation FS Filter Driver (unionfs.sys) Information Disclosure Vulnerability. Out-of-bounds read in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to disclose information locally.

Affected Products

Windows 11 version 26H1 for x64-based Systems
Windows 11 Version 26H1 for ARM64-based Systems

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C