Improper Access Control in Gigabyte Control Center MBStorage Module

Mitigation Strategies

To mitigate the CVE-2026-9492 vulnerability, users should update the MBStorage DRAM lighting control module within Gigabyte Control Center to version 26.06.03.01 or later.

This update addresses the improper access control flaw that allows authenticated local attackers to send crafted IOCTL commands through the MyPortIO_x64.sys driver, preventing arbitrary read/write operations on physical memory and the escalation to kernel-level privileges.

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Executive Summary

CVE-2026-9492 is an improper access control vulnerability in the MBStorage DRAM lighting control module of the Gigabyte Control Center (GCC).

Authenticated local attackers can exploit this flaw by sending specially crafted IOCTL commands through the MyPortIO_x64.sys driver, which is part of the module.

This allows attackers to arbitrarily read and write physical memory and gain kernel-level privileges on the affected system.

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Impact Analysis

This vulnerability can have severe impacts because it allows an authenticated local attacker to gain kernel-level privileges.

With kernel-level access, an attacker can bypass many security controls, manipulate system memory arbitrarily, and potentially take full control of the affected system.

This could lead to unauthorized access to sensitive data, system instability, or the installation of persistent malicious software.

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