CVE-2026-97792 Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability
An authorized local attacker can elevate privileges via improper access control in the Windows Container Isolation FS Filter Driver.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-97792?
CVE-2026-97792 is a high-severity vulnerability in Microsoft Windows 11 23h2, published on 13 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper access control in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
Weakness: CWE-732
Which versions are affected by CVE-2026-97792?
It affects 6 products.
Products include Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h2, Microsoft Windows Server 2022, Microsoft Windows Server 2025.
How do I fix CVE-2026-97792?
No fix has been published for CVE-2026-97792 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-97792 being exploited?
There is no known exploitation of CVE-2026-97792 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 23h2
- CVE-2026-81963 Microsoft Windows Link Following
- CVE-2026-100219 Microsoft QUIC Remote Code Execution Vulnerability
- CVE-2026-96909 Windows BitLocker Remote Code Execution Vulnerability
- CVE-2026-62815 Microsoft QUIC Remote Code Execution Vulnerability
- CVE-2026-45657 Windows Kernel Remote Code Execution Vulnerability
Sources
Also known as GHSA-qfph-462g-2wpw.