medium5.1
CVE-2026-4936
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 pers…
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Ibm | Power System S1122 \(9824-22a\) Firmware | from fw1110.00 before fw1110.30 Version fw1120.00 |
| Ibm | Power System S1124 \(9824-42a\) Firmware | from fw1110.00 before fw1110.30 Version fw1120.00 |
| Ibm | Power System S1122s \(9824-22b\) Firmware | from fw1110.00 before fw1110.30 Version fw1120.00 |
| Ibm | Power System S1114 \(9824-41b\) Firmware | from fw1110.00 before fw1110.30 Version fw1120.00 |
| Ibm | Power System L1122 \(9856-22h\) Firmware | from fw1110.00 before fw1110.30 Version fw1120.00 |
| Ibm | Power System L1124 \(9856-42h\) Firmware | from fw1110.00 before fw1110.30 Version fw1120.00 |
| Ibm | Power System E1150 \(9043-Mru\) Firmware | from fw1110.00 before fw1110.30 Version fw1120.00 |
| Ibm | Power System S1112 \(9242-21b\) Firmware | Version fw1120.00 |
| Ibm | Power System S1112 \(9242-21t\) Firmware | Version fw1120.00 |
| Ibm | Power System E1080 \(9080-Hex\) Firmware | from fw1060.00 before fw1060.72 |
| Ibm | Power System S1022 \(9105-22a\) Firmware | from fw1060.00 before fw1060.72 |
| Ibm | Power System S1024 \(9105-42a\) Firmware | from fw1060.00 before fw1060.72 |