CVE-2026-97790 MEDIUM

CVE-2026-97790: Windows Container Isolation FS Filter Driver (unionfs.sys) Tampering Vulnerability

Vendor Microsoft
Product Windows 11 Version 24H2
Weakness CWE-59
Published October 13, 2026
Last update October 23, 2026
View on NVD All CVEs

CVSS base score

5.5/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

October 13, 2026 CVE published
October 23, 2026 Record updated