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.
History

Wed, 06 Aug 2025 09:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Code Execution / Escalation of Privileges in ThrottleStop
Weaknesses CWE-782
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Kaspersky

Published: 2025-08-06T09:35:00.684Z

Updated: 2025-08-06T09:35:00.684Z

Reserved: 2025-07-17T15:54:18.122Z

Link: CVE-2025-7771

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2025-08-06T10:15:35.597

Modified: 2025-08-06T10:15:35.597

Link: CVE-2025-7771

cve-icon Redhat

No data.