CVE-2026-113761

Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability

Published Nov 10, 2026 CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Description
Untrusted pointer dereference in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Microsoft windows 11 26h1
Vendors & Products Microsoft windows 11 26h1
Type Values Removed Values Added
Description Untrusted pointer dereference in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
Title Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft windows 11 26h1
Weaknesses CWE-362
CWE-822
CPEs cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:arm64:*
Vendors & Products Microsoft
Microsoft windows 11 26h1
References
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 13, 2026, 6:07 PM
Reserved
Oct 20, 2026, 5:21 PM
Status
Awaiting Analysis
Published
Nov 10, 2026, 7:18 PM
Modified
Nov 10, 2026, 9:18 PM