CVE-2025-7771

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 products

Throttlestop.Sys

Fix

Available

CVSS 4.0

8.7 HIGH

EPSS

6.8% (93th percentile)

Weakness

CWE-782

NVD status

Deferred

Published

2025-08-06

Attack patterns

CAPEC-679

Entry point

PhysicalAddress path

Path

\\.\ThrottleStop