CVE-2026-18821
IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 Power Systems Firmware is affected by…
Impact
IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 Power Systems Firmware is affected by a vulnerability in partition firmware during network boot. An unauthenticated attacker on the same network as a partition undergoing network boot can send a malformed packet, allowing arbitrary code to be executed in the partition firmware and compromising everything subsequently loaded by that partition. Other partitions and the managed system are not affected. Only partitions actively performing a network boot are affected, resulting in a confidentiality, integrity, and availability impact.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Ibm | Power System S1122 \(9824-22a\) Firmware | from fw1110.00 before fw1110.31 Version fw1120.00 |
| Ibm | Power System S1124 \(9824-42a\) Firmware | from fw1110.00 before fw1110.31 Version fw1120.00 |
| Ibm | Power System S1122s \(9824-22b\) Firmware | from fw1110.00 before fw1110.31 Version fw1120.00 |
| Ibm | Power System S1114 \(9824-41b\) Firmware | from fw1110.00 before fw1110.31 Version fw1120.00 |
| Ibm | Power System L1122 \(9856-22h\) Firmware | from fw1110.00 before fw1110.31 Version fw1120.00 |
| Ibm | Power System L1124 \(9856-42h\) Firmware | from fw1110.00 before fw1110.31 Version fw1120.00 |
| Ibm | Power System E1150 \(9043-Mru\) Firmware | from fw1110.00 before fw1110.31 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 fw1060.81 |
| Ibm | Power System S1022 \(9105-22a\) Firmware | from fw1060.00 before fw1060.81 |
| Ibm | Power System S1024 \(9105-42a\) Firmware | from fw1060.00 before fw1060.81 |