CVE-2018-6260

What it actually does

The vulnerability exposes GPU-processed application data through a side channel in GPU performance counters, enabling local users to read confidential information from GPU memory or computations without direct access.

Why it matters to the business

Sensitive data processed by GPU-accelerated applications such as graphics rendering or machine learning workloads may be leaked to other local users, increasing risk of data exposure in shared computing environments.

How an attack unfolds

A local attacker with standard user privileges accesses exposed GPU performance counters on an NVIDIA driver to observe timing or utilization patterns that reveal data from another application's GPU computations via side-channel inference.

How to fix it

Upgrade NVIDIA GPU drivers to versions released after November 2018 that address performance counter exposure; restrict local access to GPU devices via system permissions where updates are not feasible.

How to confirm the fix worked

Verify current NVIDIA driver version against vendor security bulletins; test that performance counters no longer leak cross-application data using vendor-provided validation tools or custom side-channel test harnesses.

Typical attack path

1. Gain local user access to the target system
2. Identify and access GPU performance counter interfaces
3. Monitor counters during target application GPU activity
4. Analyze side-channel data to reconstruct sensitive GPU-processed information

How to detect it

Review system logs for unusual local access to NVIDIA performance counter APIs or device files; examine process activity for repeated queries to GPU metrics interfaces around the time of sensitive GPU workloads.

What your security team should do

• Apply the latest NVIDIA GPU driver updates immediately across all affected systems
• Audit and restrict local user permissions to GPU resources
• Monitor for any remaining legacy driver deployments given the 2018 disclosure date