CVE-2026-83939 Windows Secure Kernel Mode Elevation of Privilege Vulnerability
An authorized local attacker can elevate privileges via an untrusted pointer dereference in Windows Secure Kernel Mode.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-83939?
CVE-2026-83939 is a high-severity vulnerability in Microsoft Windows 11 26h1, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Untrusted pointer dereference in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
Weakness: CWE-822
Which versions are affected by CVE-2026-83939?
It affects 1 product.
Products include Microsoft Windows 11 26h1.
How do I fix CVE-2026-83939?
No fix has been published for CVE-2026-83939 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-83939 being exploited?
There is no known exploitation of CVE-2026-83939 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 26h1
- CVE-2026-85921 Windows Secure Kernel Mode Elevation of Privilege Vulnerability
- CVE-2026-105005 Windows Schannel Remote Code Execution Vulnerability
- CVE-2026-85850 Windows Kernel Elevation of Privilege Vulnerability
- CVE-2026-97803 Windows Kernel Elevation of Privilege Vulnerability
- CVE-2026-69544 Windows SMB Client Elevation of Privilege Vulnerability
Sources
Also known as GHSA-g853-w9cq-jqfm.