Windows Common Log File System Driver Elevation of Privilege Vulnerability
Integer underflow (wrap or wraparound) in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
MSRC compact vulnerability detail
CVE-2026-40397 · Windows Common Log File System Driver Elevation of Privilege Vulnerability
Integer underflow (wrap or wraparound) in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Signals
Windows Common Log File System Driver
Elevation of Privilege
Exploited: No
Publicly disclosed: No
Exploitability: Exploitation More Likely
CWE
Patch Diff
Loading module diff metadata...
Resolved binary override
Use this when the MSRC module name cannot be mapped automatically or the resolved binary looks wrong.
Description
Integer underflow (wrap or wraparound) in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
FAQ / Articles
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Integer underflow (wrap or wraparound) in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
FAQ
What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.