IBMCVE-2026-4936
IBM PowerVM Hypervisor Platform KeyStore
Medium5.1CVE-2026-4936 · Published Aug 19, 2026 · updated Aug 25, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| PowerVM Hypervisor Product | >= FW1110.00, <= FW1110.20 | No fix yet |
| >= FW1060.00, <= FW1060.71 | No fix yet | |
| >= FW950.00, <= FW950.H2 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-331
More IBM advisories
All IBM| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 19 | IBM DS8900F (R9.4): information disclosure | High7.4 | No fix yet |
| Aug 19 | IBM DS8900F: authenticated user could create a user with privileged user | High7.5 | No fix yet |
| Aug 19 | IBM DS8900F (R9.4): authenticated user could read or modify another user's | Medium5.4 | No fix yet |
| Aug 19 | IBM PowerVM Hypervisor: local attacker could decrypt encrypted data | Medium5.3 | No fix yet |
| Aug 19 | IBM go-slug: local attacker could bypass | Medium5.5 | No fix yet |
| Aug 19 | IBM i: denial of service | Medium5.4 | No fix yet |