CVE-2025-36194
📋 TL;DR
This vulnerability in IBM PowerVM Hypervisor firmware allows a peer partition to access a limited amount of data in specific shared processor configurations. It affects IBM PowerVM Hypervisor firmware versions FW1110.00-FW1110.03, FW1060.00-FW1060.51, and FW950.00-FW950.F0. The exposure occurs during certain operations and requires specific shared processor configurations.
💻 Affected Systems
- IBM PowerVM Hypervisor
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker with access to a peer partition could potentially access sensitive data from another partition, leading to information disclosure that could facilitate further attacks.
Likely Case
Limited data exposure between peer partitions in shared processor environments, potentially revealing system state information but not critical secrets.
If Mitigated
With proper partition isolation and access controls, the impact is minimal as only limited data is exposed and requires specific configurations.
🎯 Exploit Status
Exploitation requires access to a peer partition and specific shared processor configurations. The vulnerability exposes limited data during certain operations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: FW1110.04, FW1060.52, FW950.F1 and later
Vendor Advisory: https://www.ibm.com/support/pages/node/7257555
Restart Required: Yes
Instructions:
1. Download the appropriate firmware update from IBM Fix Central. 2. Apply the firmware update following IBM PowerVM firmware update procedures. 3. Reboot the system to activate the new firmware.
🔧 Temporary Workarounds
Use Dedicated Processor Configurations
allConfigure partitions with dedicated processors instead of shared processors to eliminate the vulnerability.
Partition Isolation
allEnsure proper partition isolation and access controls to limit potential data exposure between partitions.
🧯 If You Can't Patch
- Use dedicated processor configurations instead of shared processors
- Implement strict access controls and monitoring between partitions
🔍 How to Verify
Check if Vulnerable:
Check firmware version using 'lparstat -i' or HMC/IVM interface and verify if running affected versions with shared processor configurations.Check Version:
lparstat -i | grep -i firmwareVerify Fix Applied:
Verify firmware version is FW1110.04+, FW1060.52+, or FW950.F1+ using 'lparstat -i' or HMC/IVM interface.📡 Detection & Monitoring
Log Indicators:
- Unusual partition-to-partition communication patterns
- Unexpected data access attempts between partitions
Network Indicators:
- Unusual inter-partition network traffic in shared processor environments
SIEM Query:
source="powervm_logs" AND (event_type="partition_access" OR event_type="shared_processor_activity")