CVE-2025-7771: Code Execution / Escalation of Privileges in ThrottleStop
ThrottleStop.sys, a legitimate driver, exposes two IOCTL interfaces that allow arbitrary read and write access to physical memory via the MmMapIoSpace function. This insecure implementation can be exploited by a malicious user-mode application to patch the running Windows kernel and invoke arbitrary kernel functions with ring-0 privileges. The vulnerability enables local attackers to execute arbitrary code in kernel context, resulting in privilege escalation and potential follow-on attacks, such as disabling security software or bypassing kernel-level protections. ThrottleStop.sys version 3.0.0.0 and possibly others are affected. Apply updates per vendor instructions.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-7771?
CVE-2025-7771 is considered a critical vulnerability due to its potential to allow arbitrary kernel memory modifications.
How do I fix CVE-2025-7771?
The recommended fix for CVE-2025-7771 is to uninstall the ThrottleStop driver and ensure that your system is updated with the latest security patches.
What are the potential impacts of CVE-2025-7771?
Exploitation of CVE-2025-7771 can lead to unauthorized access to sensitive data and compromise the integrity of the Windows operating system.
Who is affected by CVE-2025-7771?
CVE-2025-7771 affects users of the ThrottleStop.sys driver, commonly used for performance tuning on Windows systems.
What is ThrottleStop.sys in relation to CVE-2025-7771?
ThrottleStop.sys is a legitimate driver that, in its current implementation, contains a security flaw that can be exploited due to improper handling of IOCTL requests.