CVE-2025-33221 Overview
CVE-2025-33221 is a vulnerability in the NVIDIA Display Driver for Windows and Linux. The flaw resides in the kernel driver and stems from incorrect permission assignment for a critical resource. A local user with high privileges can trigger the condition to cause data tampering or denial of service on the affected system.
The issue is tracked under CWE-20: Improper Input Validation. NVIDIA published guidance for affected driver branches in its security bulletin. Exploitation requires local access and elevated privileges, limiting remote attack surface but creating risk on shared and multi-tenant systems.
Critical Impact
Successful exploitation can lead to data tampering and denial of service against systems running affected NVIDIA Display Driver builds on Windows and Linux.
Affected Products
- NVIDIA Display Driver for Windows
- NVIDIA Display Driver for Linux
- NVIDIA GPU kernel-mode driver components (see vendor advisory for specific branches and versions)
Discovery Timeline
- 2026-05-26 - CVE-2025-33221 published to the National Vulnerability Database (NVD)
- 2026-05-26 - Last updated in NVD database
Technical Details for CVE-2025-33221
Vulnerability Analysis
The vulnerability exists in the NVIDIA Display Driver kernel component. The driver assigns incorrect permissions to a critical resource exposed by the kernel-mode component. A local authenticated user can manipulate that resource in ways the driver does not anticipate.
The consequence is twofold. First, an attacker can tamper with data structures or state managed by the driver. Second, the driver may enter an unstable state, producing denial of service for GPU-dependent workloads or the entire host. The integrity and availability of GPU-accelerated services are directly impacted.
The vulnerability is categorized under CWE-20: Improper Input Validation. The attack vector is local, and the attacker must already hold elevated privileges on the target host, which constrains opportunistic abuse but remains relevant for multi-user systems, VDI hosts, and shared GPU infrastructure.
Root Cause
The root cause is incorrect permission assignment for a critical resource within the kernel driver. The driver exposes an interface or object without enforcing the access controls expected for its sensitivity. As a result, a privileged local user can interact with the resource in unintended ways, bypassing assumptions made elsewhere in the driver code path.
Attack Vector
Exploitation requires local access to a host running a vulnerable NVIDIA Display Driver build. The attacker must hold high privileges on the system. From that position, the attacker interacts with the affected kernel driver resource to alter state or trigger a fault.
No verified public proof-of-concept code is available at the time of writing. Technical details beyond NVIDIA's bulletin are not yet published. Refer to the NVIDIA Support Article for vendor-confirmed information on affected branches.
Detection Methods for CVE-2025-33221
Indicators of Compromise
- Unexpected crashes, bug checks, or kernel panics referencing NVIDIA driver modules such as nvlddmkm.sys on Windows or nvidia.ko on Linux
- GPU workload failures, display reset events, or TDR (Timeout Detection and Recovery) events on hosts where they were not previously observed
- Local privileged processes opening unusual handles to NVIDIA kernel driver device objects
Detection Strategies
- Inventory installed NVIDIA Display Driver versions across Windows and Linux hosts and compare against the fixed versions listed in the NVIDIA advisory
- Audit local administrators and privileged service accounts on GPU-equipped systems, since exploitation requires high privileges
- Correlate kernel-mode driver crash telemetry with process activity from non-system accounts to surface suspicious interactions with the GPU driver
Monitoring Recommendations
- Forward Windows kernel crash dumps and Linux dmesg output mentioning NVIDIA modules to a central log or SIEM for review
- Monitor for driver reinstallation, downgrade, or replacement events on production and VDI hosts
- Track privilege escalation paths on GPU hosts so that any local high-privilege foothold is detected before it can be used against the kernel driver
How to Mitigate CVE-2025-33221
Immediate Actions Required
- Apply the updated NVIDIA Display Driver releases identified in the vendor bulletin for both Windows and Linux
- Restrict local administrative and root access on systems running NVIDIA GPUs, since the vulnerability requires high local privileges
- Prioritize patching on multi-user systems, VDI infrastructure, and shared GPU compute hosts where local privileged users are more numerous
Patch Information
NVIDIA published fixed driver versions in its security notice. Consult the NVIDIA Support Article for the exact patched branches and download links. Validate the deployed driver version on each host after update using nvidia-smi on Linux or the NVIDIA Control Panel on Windows.
Workarounds
- No vendor-supplied workaround replaces the patch; reduce risk by limiting which accounts can obtain local high privileges on GPU hosts
- Enforce least privilege on service accounts that interact with GPU workloads and remove unnecessary local administrator membership
- On systems where patching is delayed, increase monitoring of NVIDIA kernel driver events and restrict interactive logon to trusted administrators
# Verify installed NVIDIA driver version after patching
# Linux
nvidia-smi --query-gpu=driver_version --format=csv,noheader
# Windows (PowerShell)
Get-CimInstance Win32_PnPSignedDriver |
Where-Object { $_.DeviceName -like '*NVIDIA*' } |
Select-Object DeviceName, DriverVersion, DriverDate
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
