Product:
Windows Common Log File System Driver
Summary
An integer underflow vulnerability in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally. This flaw can lead to significant security risks as it enables unauthorized access to system resources. Attackers can exploit this vulnerability to gain higher privileges than intended.
Details
| Severity | Base Score | CVE |
|---|---|---|
| HIGH | 7.8 | CVE-2026-40397 |
Exploitation
To exploit this vulnerability, an attacker must have local access to the system and can leverage the integer underflow condition to manipulate the system’s memory. By carefully crafting input that triggers the underflow, the attacker can escalate their privileges and gain unauthorized access to sensitive system functions.
Affected Products
- Windows Common Log File System Driver: Vulnerable to integer underflow allowing local privilege escalation.
Mitigation
To mitigate this vulnerability, it is recommended to apply the latest security updates provided by Microsoft. Regularly updating systems and monitoring for unusual activity can also help reduce the risk of exploitation. Users should ensure that only authorized personnel have local access to sensitive systems.