CVE-2022-4990: ASUS AI Suite 3 Privilege Escalation Flaw

CVE-2022-4990 Overview

CVE-2022-4990 is a local privilege escalation vulnerability in the ASUS AI Suite 3 driver. The driver improperly validates the quantity specified in user-supplied input, allowing a local attacker to bypass security checks and access restricted memory blocks via crafted I/O control (IOCTL) requests. Successful exploitation grants elevated privileges on the affected Windows host. The advisory notes that the product was unsupported when the CVE was assigned, meaning ASUS is not maintaining fixes for the vulnerable release. The weakness is classified under [CWE-1284] (Improper Validation of Specified Quantity in Input).

Critical Impact
A low-privileged local user can escalate to kernel-level access, compromising confidentiality, integrity, and availability of the host.

Affected Products

ASUS AI Suite 3 (kernel-mode driver component)
Unsupported release at the time of CVE assignment
Windows systems where the vulnerable ASUS driver is installed

Discovery Timeline

2026-07-03 - CVE-2022-4990 published to the National Vulnerability Database (NVD)
2026-07-06 - Last updated in NVD database

Technical Details for CVE-2022-4990

Vulnerability Analysis

The ASUS AI Suite 3 driver exposes an IOCTL interface that user-mode code can call through DeviceIoControl. The driver accepts a size or length field from the caller but fails to validate that the specified quantity is within the bounds of the memory region the driver is permitted to touch. An attacker can supply a crafted length value that instructs the driver to read from or write to physical or kernel memory outside the intended range.

Because the driver runs at ring 0, any arbitrary read or write primitive it exposes becomes a direct path to SYSTEM. Attackers commonly abuse such primitives to disable security callbacks, patch process tokens, or load unsigned code into the kernel. This class of flaw is a recurring pattern in original equipment manufacturer (OEM) utility drivers that bridge user-mode tuning tools with hardware model-specific registers (MSRs) and physical memory.

Root Cause

The root cause is missing or insufficient bounds checking on a length or count field that arrives from user mode through an IOCTL request. The driver trusts the caller-supplied quantity when computing offsets into restricted memory blocks, violating the kernel/user trust boundary.

Attack Vector

Exploitation requires local access and low privileges on a system where the vulnerable driver is loaded. The attacker opens a handle to the driver's device object and issues one or more DeviceIoControl calls with a malformed input buffer whose length field is outside expected bounds. The driver then performs a read or write against restricted memory using the attacker-controlled quantity, yielding kernel read/write primitives that lead to privilege escalation.

No verified public proof-of-concept exploit is referenced in the advisory. Refer to the ASUS Security Advisory for technical details.

Detection Methods for CVE-2022-4990

Indicators of Compromise

Presence of the ASUS AI Suite 3 driver on systems where the software is not required for daily operations.
Unexpected loading of the ASUS AI Suite 3 kernel driver by non-ASUS processes or by processes running from user-writable directories.
New services or scheduled tasks running as SYSTEM shortly after a low-privileged process interacted with the driver's device object.

Detection Strategies

Monitor DeviceIoControl calls to the ASUS AI Suite 3 driver device object from unusual or unsigned processes.
Alert on driver load events (Windows event ID 6 in Sysmon) for the vulnerable AI Suite 3 driver, especially on servers or hardened endpoints where it should not exist.
Correlate token manipulation or process integrity level changes with prior IOCTL activity against the driver.

Monitoring Recommendations

Enable Microsoft's vulnerable driver blocklist and log blocked driver load attempts.
Track privilege escalation telemetry: SYSTEM shells spawned from medium-integrity parents.
Maintain an inventory of OEM utility drivers across the fleet and flag drivers marked end-of-life or unsupported.

How to Mitigate CVE-2022-4990

Immediate Actions Required

Uninstall ASUS AI Suite 3 from systems where it is not strictly required, particularly production servers and privileged workstations.
Enable the Microsoft recommended driver blocklist and Hypervisor-Protected Code Integrity (HVCI) to prevent loading of known-vulnerable drivers.
Restrict local logon and interactive access to trusted administrators, since exploitation requires local presence.

Patch Information

The advisory marks the affected release as unsupported when CVE-2022-4990 was assigned. No vendor patch is committed to for the unsupported version. Consult the ASUS Security Advisory for guidance on supported successor utilities and removal instructions.

Workarounds

Remove the ASUS AI Suite 3 driver (.sys file) and associated service from affected hosts to eliminate the attack surface.
Apply Windows Defender Application Control (WDAC) policies that block loading of the vulnerable driver by hash or signer.
Enforce least-privilege on endpoints so untrusted code cannot open a handle to the driver's device object.

bash

# Example: query and remove the vulnerable driver service on Windows
sc.exe query AsusCertService
sc.exe stop AsusCertService
sc.exe delete AsusCertService
# Then remove the AI Suite 3 application via Add/Remove Programs