CVE-2025-33220
📋 TL;DR
NVIDIA vGPU software contains a use-after-free vulnerability in the Virtual GPU Manager that allows a malicious guest VM to access heap memory after it has been freed. This could lead to code execution, privilege escalation, or denial of service. Affected systems include those running NVIDIA vGPU software with GPU virtualization enabled.
💻 Affected Systems
- NVIDIA vGPU software
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full guest-to-host escape with root privileges, allowing complete compromise of the hypervisor and all guest VMs.
Likely Case
Denial of service through hypervisor crash or guest VM compromise leading to data tampering within the affected VM.
If Mitigated
Isolated guest VM compromise without hypervisor escape if proper isolation controls are effective.
🎯 Exploit Status
Exploitation requires guest VM access and knowledge of heap manipulation techniques. No public exploits available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: vGPU software version 16.6 or later
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5747
Restart Required: Yes
Instructions:
1. Download vGPU software version 16.6 or later from NVIDIA's website. 2. Stop all guest VMs using vGPU. 3. Apply the update to the hypervisor host. 4. Reboot the hypervisor host. 5. Verify the update was successful and restart guest VMs.
🔧 Temporary Workarounds
Isolate vGPU-enabled VMs
allPlace vGPU-enabled VMs on isolated network segments and restrict inter-VM communication
Disable vGPU for untrusted workloads
allRemove vGPU passthrough for VMs that don't require GPU acceleration
🧯 If You Can't Patch
- Implement strict network segmentation for vGPU-enabled VMs
- Apply principle of least privilege to guest VM accounts and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check vGPU software version on hypervisor: On Linux: nvidia-smi -q | grep 'Driver Version'. On Windows: Check NVIDIA Control Panel or Programs and Features.Check Version:
nvidia-smi -q | grep 'Driver Version' (Linux) or check NVIDIA Control Panel (Windows)Verify Fix Applied:
Verify vGPU software version is 16.6 or higher using the same commands as above.📡 Detection & Monitoring
Log Indicators:
- Hypervisor crash logs
- Unexpected guest VM memory access patterns
- vGPU driver error messages in system logs
Network Indicators:
- Unusual network traffic from vGPU-enabled VMs to hypervisor management interfaces
SIEM Query:
source="hypervisor_logs" AND ("vGPU" OR "NVIDIA") AND ("crash" OR "error" OR "access violation")