CVE-2026-16004 in Armoury Crate
Summary
by MITRE • 09/08/2026
Exposed IOCTL with Insufficient Access Control in Armoury Crate driver allows a local user to read and write arbitrary PCI/PCIe configuration space via crafted IOCTL requests by bypassing the driver's verification. Refer to the ' Security Update for Armoury Crate App' section on the ASUS Security Advisory for more information.
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Analysis
by VulDB Data Team • 09/08/2026
The vulnerability identified in the Asus Armoury Crate driver represents a critical failure in access control mechanisms within kernel-mode software, specifically involving an exposed IOCTL interface that lacks sufficient privilege verification. This flaw allows any local user with standard execution privileges to interact directly with hardware configuration spaces via crafted input requests. The core technical issue lies in the driver's inability to properly validate the caller's security context before processing specific I/O Control Codes designed for system management tasks. By bypassing these internal verification checks, an attacker can execute operations that are typically restricted to administrators or trusted applications, effectively elevating their privileges within the operating system environment without requiring explicit elevation mechanisms such as UAC prompts on Windows systems.
From a technical perspective, this vulnerability enables direct read and write access to arbitrary PCI and PCIe configuration space registers. The PCI/PCIe configuration space contains critical hardware identification data, interrupt routing information, memory mapping details, and control registers that dictate how peripheral devices operate within the system bus architecture. Unauthorized modification of these registers can lead to severe instability, including system crashes or blue screens due to invalid device configurations. More dangerously, it allows for low-level manipulation of hardware resources, potentially facilitating DMA attacks where malicious software directly accesses physical memory through PCIe devices, bypassing standard OS memory protection boundaries. This capability undermines the isolation guarantees provided by modern operating systems and exposes sensitive data stored in adjacent memory regions or connected peripherals.
The operational impact of this vulnerability is significant as it facilitates local privilege escalation and potential system compromise. An attacker leveraging this flaw can modify device settings to disable security features, redirect interrupts for denial-of-service purposes, or extract confidential information such as encryption keys cached in hardware registers. Furthermore, the ability to write arbitrary values to configuration space allows an adversary to reconfigure devices like network adapters or storage controllers to intercept traffic or exfiltrate data at a level below standard antivirus detection capabilities. This aligns with common attack patterns observed in advanced persistent threats seeking long-term footholds within enterprise environments by compromising hardware-level trust anchors.
In terms of industry classification, this vulnerability corresponds closely to CWE-269 Improper Privilege Management and CWE-787 Out-of-bounds Write when considering the potential for memory corruption through invalid register writes. It also relates to CWE-435 Improper Interaction Between Multiple Components if the driver fails to coordinate access controls with other system components. From a tactical standpoint, this behavior mirrors techniques documented in MITRE ATT&CK under Privilege Escalation via Kernel Exploitation and potentially Device Driver exploitation vectors such as T1068 Exploitation for Privilege Escalation or specific hardware-based attacks like DMA attacks if the PCI configuration allows direct memory access reconfiguration.
Mitigation strategies primarily involve applying the vendor-provided security updates that patch the IOCTL handler to enforce strict access control checks before processing requests from user-mode applications. System administrators should ensure that Armoury Crate and its associated drivers are updated to the latest secure versions provided by Asus. In environments where such management software is not strictly necessary, disabling or uninstalling the driver reduces the attack surface significantly. Additionally, implementing kernel-level protection mechanisms such as Driver Signature Enforcement policies and monitoring for unusual IOCTL calls from non-administrative processes can provide an additional layer of defense against exploitation attempts until patches are fully deployed across all endpoints.