CVE-2025-46708
📋 TL;DR
This vulnerability allows software running inside a guest virtual machine to make improper GPU system calls that can block other guest VMs from accessing GPU resources. It affects virtualization environments using Imagination Technologies GPU drivers where multiple VMs share GPU hardware. This is a denial-of-service vulnerability that impacts cloud providers and organizations using GPU virtualization.
💻 Affected Systems
- Imagination Technologies GPU drivers
📦 What is this software?
Ddk by Imaginationtech
Ddk by Imaginationtech
Ddk by Imaginationtech
Ddk by Imaginationtech
⚠️ Risk & Real-World Impact
Worst Case
A malicious guest VM could completely block GPU access for all other guest VMs, causing GPU-dependent workloads to fail across the virtualization host.
Likely Case
Performance degradation or temporary unavailability of GPU resources for other guest VMs sharing the same physical GPU hardware.
If Mitigated
Minimal impact with proper isolation controls and monitoring in place to detect and block malicious GPU calls.
🎯 Exploit Status
Exploitation requires code execution within a guest VM and knowledge of GPU system calls.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in reference
Vendor Advisory: https://www.imaginationtech.com/gpu-driver-vulnerabilities/
Restart Required: Yes
Instructions:
1. Check Imagination Technologies advisory for specific patch versions. 2. Update GPU drivers on virtualization hosts. 3. Restart affected systems. 4. Update guest VM drivers if applicable.
🔧 Temporary Workarounds
Isolate GPU resources
allAssign dedicated GPU resources to each guest VM to prevent cross-VM interference
Monitor GPU system calls
linuxImplement monitoring for abnormal GPU system call patterns from guest VMs
🧯 If You Can't Patch
- Implement strict access controls to prevent untrusted code from running in guest VMs
- Monitor GPU resource utilization and isolate VMs showing abnormal GPU call patterns
🔍 How to Verify
Check if Vulnerable:
Check GPU driver version against Imagination Technologies advisory and verify if GPU virtualization is enabled with multiple guest VMs.Check Version:
lspci -v | grep -i imagination (Linux) or check GPU driver properties in Device Manager (Windows)Verify Fix Applied:
Verify GPU driver version has been updated to patched version and test GPU resource sharing between guest VMs.📡 Detection & Monitoring
Log Indicators:
- Abnormal GPU system call patterns
- GPU resource allocation failures
- Guest VM GPU timeouts
SIEM Query:
source="hypervisor_logs" AND ("GPU allocation failed" OR "GPU timeout" OR "GPU system call error")