CVE-2026-4936
Power System Insufficient Entropy
- State
- Published
- Severity
- 5.1 Medium
- Published
- Aug 19, 2026
- Updated
- Aug 20, 2026
- Reserved
- Mar 26, 2026
Description
IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.1 Medium | CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N | ibm |
Weaknesses
- CWE-331 Insufficient Entropy
Affected Products
| Product | Versions |
|---|---|
PowerVM HypervisorIBM |
|
References
- https://www.ibm.com/support/pages/node/7283890vendor-advisorypatch
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