CVE-2025-58407
📋 TL;DR
This CVE describes a Time-of-Check Time-of-Use (TOCTOU) vulnerability in GPU firmware where guest VM kernel/driver software can post improper commands to exploit a race condition. This allows reading/writing data outside allocated memory boundaries, potentially escaping VM isolation. Affected systems include those using Imagination Technologies GPU hardware with vulnerable firmware/drivers in virtualized environments.
💻 Affected Systems
- Imagination Technologies GPU hardware with vulnerable firmware/drivers
📦 What is this software?
Ddk by Imaginationtech
⚠️ Risk & Real-World Impact
Worst Case
Complete VM escape allowing attacker to access host system memory, other VMs, or execute arbitrary code on the host with kernel privileges.
Likely Case
Information disclosure from host memory or other VMs, potential denial of service through system instability.
If Mitigated
Limited impact if proper VM isolation, least privilege, and monitoring are implemented; may only cause VM crashes.
🎯 Exploit Status
Exploitation requires guest VM kernel/driver access and precise timing to trigger race condition; not trivial but feasible for skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Imagination Technologies advisory for specific patched firmware/driver versions.
Vendor Advisory: https://www.imaginationtech.com/gpu-driver-vulnerabilities/
Restart Required: Yes
Instructions:
1. Check Imagination Technologies advisory for affected products. 2. Update GPU firmware to patched version. 3. Update guest VM GPU drivers. 4. Reboot affected systems.
🔧 Temporary Workarounds
Disable GPU passthrough
allPrevent guest VMs from accessing GPU hardware directly.
Hypervisor-specific configuration changes required
Isolate GPU resources
allAssign dedicated GPU resources per VM without sharing.
Hypervisor-specific GPU assignment configuration
🧯 If You Can't Patch
- Implement strict network segmentation to limit VM communication
- Monitor for unusual GPU command patterns or VM escape attempts
🔍 How to Verify
Check if Vulnerable:
Check GPU firmware version against Imagination Technologies advisory; verify if using GPU passthrough/sharing in virtualized environment.Check Version:
Platform-specific commands: 'lspci -v' on Linux for GPU details, or check hypervisor GPU configuration.Verify Fix Applied:
Confirm GPU firmware and drivers are updated to patched versions; test VM isolation.📡 Detection & Monitoring
Log Indicators:
- Unusual GPU command patterns in hypervisor logs
- VM crash logs related to GPU access
- Failed VM isolation alerts
Network Indicators:
- Unexpected network traffic from VMs indicating potential escape
SIEM Query:
Search for: 'GPU firmware error' OR 'VM escape attempt' OR 'TOCTOU' in hypervisor/system logs