CVE-2025-29944: AMD Sensor Fusion Hub Buffer Overflow

CVE-2025-29944 Overview

CVE-2025-29944 is a buffer overflow vulnerability in the AMD Sensor Fusion Hub Driver. The flaw allows a local attacker with low privileges to write data outside the bounds of an allocated buffer. Successful exploitation can trigger a denial of service condition or system crash on affected machines.

The weakness is classified under [CWE-120] (Buffer Copy without Checking Size of Input). AMD published the issue in security bulletin AMD-SB-4015. The vulnerability requires local access and authenticated execution, which limits remote exploitation but remains relevant for multi-user systems and post-compromise scenarios.

Critical Impact
A local, low-privileged attacker can trigger an out-of-bounds write in the AMD Sensor Fusion Hub Driver, causing denial of service or a full system crash on affected Windows endpoints.

Affected Products

AMD Sensor Fusion Hub Driver (see AMD Product Security Bulletin AMD-SB-4015 for the affected driver versions and platforms)
Windows endpoints shipping with AMD platform drivers that include the Sensor Fusion Hub component
OEM laptop and desktop systems using AMD processors with sensor fusion functionality

Discovery Timeline

2026-05-15 - CVE-2025-29944 published to the National Vulnerability Database
2026-05-15 - Last updated in NVD database

Technical Details for CVE-2025-29944

Vulnerability Analysis

The AMD Sensor Fusion Hub Driver is a kernel-mode component that brokers data between hardware sensors and the operating system. A buffer overflow within the driver enables a local attacker to write beyond the bounds of an allocated kernel buffer. The result is memory corruption that destabilizes the driver and the surrounding kernel state.

Because the affected code path runs in kernel context, an out-of-bounds write typically produces a bug check (BSOD) on Windows. The attack does not require user interaction, but the attacker must already hold valid local credentials on the host. The vulnerability impacts availability only, with no documented confidentiality or integrity impact.

No public exploit code, proof-of-concept, or in-the-wild exploitation has been reported. The EPSS data places exploitation probability at the low end of the scoring range.

Root Cause

The root cause is missing or insufficient bounds checking when the driver copies attacker-controlled input into a fixed-size buffer. This pattern matches [CWE-120], where the size of the source data is not validated against the destination buffer length before the copy operation. The defect resides in the driver's handling of input passed from user mode through its IOCTL or device interface.

Attack Vector

Exploitation requires a local user account on the target system. The attacker opens a handle to the AMD Sensor Fusion Hub Driver device object and sends a crafted request containing oversized input. The driver processes the request without validating the input length, overruns the destination buffer, and corrupts adjacent kernel memory. The corrupted state causes the kernel to crash and the system to reboot, producing denial of service.

Specific technical details, including the exact IOCTL codes and buffer sizes, are not disclosed in the public advisory. Refer to the AMD Product Security Bulletin AMD-SB-4015 for vendor-supplied technical context.

Detection Methods for CVE-2025-29944

Indicators of Compromise

Unexpected system crashes or bug check events on machines running AMD platforms, particularly with stop codes referencing the sensor fusion driver image
Minidump files in C:\Windows\Minidump\ that name the AMD Sensor Fusion Hub Driver in the faulting module field
Repeated abnormal shutdowns logged as Event ID 41 (Kernel-Power) shortly after low-privileged user activity

Detection Strategies

Inventory endpoints to identify systems running vulnerable AMD Sensor Fusion Hub Driver versions listed in AMD-SB-4015
Correlate process execution telemetry from non-administrative users with subsequent kernel crashes referencing AMD sensor drivers
Monitor handle opens to the sensor fusion device object followed by unusually large DeviceIoControl payloads from unprivileged processes

Monitoring Recommendations

Forward Windows kernel crash events and WER (Windows Error Reporting) artifacts to a centralized log platform for correlation
Track driver version inventory across the fleet and alert when unpatched versions remain after the maintenance window
Baseline normal user-mode interaction with platform drivers and flag deviations such as repeated failed IOCTL calls preceding crashes

How to Mitigate CVE-2025-29944

Immediate Actions Required

Apply the updated AMD Sensor Fusion Hub Driver provided through OEM update channels or the AMD chipset driver package as soon as it is available for the affected platform
Restrict local logon rights on shared and multi-user systems to reduce the population of accounts that can reach the vulnerable driver interface
Audit endpoints to confirm the installed driver version matches or exceeds the fixed version listed in AMD-SB-4015

Patch Information

AMD has published guidance in the AMD Product Security Bulletin AMD-SB-4015. Updated drivers are distributed through OEM system update utilities and the AMD chipset driver installer. Apply the vendor-supplied driver package, then reboot to ensure the new driver image is loaded by the kernel.

Workarounds

Where the sensor fusion functionality is not required, disable the AMD Sensor Fusion Hub device in Device Manager until the patched driver is deployed
Enforce least privilege so that interactive sessions do not run with administrative tokens, limiting downstream impact of a kernel crash
Maintain current system backups and Windows restore points so that a forced reboot from exploitation does not result in data loss

bash

# Query installed AMD Sensor Fusion Hub Driver version on Windows (PowerShell)
Get-PnpDevice -FriendlyName "*Sensor Fusion*" |
    ForEach-Object {
        Get-PnpDeviceProperty -InstanceId $_.InstanceId -KeyName 'DEVPKEY_Device_DriverVersion'
    }

# Disable the device as a temporary workaround (requires administrator)
Get-PnpDevice -FriendlyName "*AMD Sensor Fusion Hub*" | Disable-PnpDevice -Confirm:$false