CVE-2019-0959 Windows Common Log File System Driver Elevation of Privilege Vulnerability

High 7.0 Published 12 Jun 2019 Updated 20 May 2025

An attacker with local access can exploit a memory handling flaw in the Windows CLFS driver to execute code with elevated privileges.

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-2019-0959?

CVE-2019-0959 is a high-severity vulnerability in Microsoft Windows 10, published on 12 Jun 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run processes in an elevated context. To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system. The security update addresses the vulnerability by correcting how CLFS handles objects in memory.

Which versions are affected by CVE-2019-0959?

It affects 3 products.

Products include Microsoft Windows 10, Microsoft Windows Server 2016, Microsoft Windows Server 2019.

How do I fix CVE-2019-0959?

No fix has been published for CVE-2019-0959 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-0959 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-0959 exists.

Public exploit code: 1 Exploit-DB entry.

All Microsoft Windows 10 vulnerabilities

Sources

Also known as GHSA-fvqq-gr4j-pf2q.