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 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.

• ibm power system s1122 \(9824-22a\) firmware (>= fw1110.00 < fw1110.31) • ibm power system s1122 \(9824-22a\) firmware fw1120.00 • ibm power system s1124 \(9824-42a\) firmware (>= fw1110.00 < fw1110.31) • ibm power system s1124 \(9824-42a\) firmware fw1120.00 • ibm power system s1122s \(9824-22b\) firmware (>= fw1110.00 < fw1110.31) • ibm power system s1122s \(9824-22b\) firmware fw1120.00 • ibm power system s1114 \(9824-41b\) firmware (>= fw1110.00 < fw1110.31) • ibm power system s1114 \(9824-41b\) firmware fw1120.00 • ibm power system l1122 \(9856-22h\) firmware (>= fw1110.00 < fw1110.31) • ibm power system l1122 \(9856-22h\) firmware fw1120.00 • ibm power system l1124 \(9856-42h\) firmware (>= fw1110.00 < fw1110.31) • ibm power system l1124 \(9856-42h\) firmware fw1120.00 • ibm power system e1150 \(9043-mru\) firmware (>= fw1110.00 < fw1110.31) • ibm power system e1150 \(9043-mru\) firmware fw1120.00 • ibm power system s1112 \(9242-21b\) firmware fw1120.00 • ibm power system s1112 \(9242-21t\) firmware fw1120.00 • ibm power system e1080 \(9080-hex\) firmware (>= fw1060.00 < fw1060.81) • ibm power system s1022 \(9105-22a\) firmware (>= fw1060.00 < fw1060.81) • ibm power system s1024 \(9105-42a\) firmware (>= fw1060.00 < fw1060.81) • ibm power system s1022s \(9105-22b\) firmware (>= fw1060.00 < fw1060.81) • ibm power system s1014 \(9105-41b\) firmware (>= fw1060.00 < fw1060.81) • ibm power system l1022 \(9786-22h\) firmware (>= fw1060.00 < fw1060.81) • ibm power system l1024 \(9786-42h\) firmware (>= fw1060.00 < fw1060.81) • ibm power system e1050 \(9043-mrx\) firmware (>= fw1060.00 < fw1060.81) • ibm power system s1012 \(9028-21b\) firmware (>= fw1060.00 < fw1060.81) • ibm power system e1180 \(9080-heu\) firmware (>= fw1110.00 < fw1110.31) • ibm power system e1180 \(9080-heu\) firmware fw1120.00 • ibm power system s922 \(9009-22g\) firmware (>= fw950.00 < fw950.h3) • ibm power system h922 \(9223-22s\) firmware (>= fw950.00 < fw950.h3) • ibm power system s914 \(9009-41g\) firmware (>= fw950.00 < fw950.h3) • ibm power system s924 \(9009-42g\) firmware (>= fw950.00 < fw950.h3) • ibm power system h924 \(9223-42s\) firmware (>= fw950.00 < fw950.h3) • ibm power system e950 \(9040-mr9\) firmware (>= fw950.00 < fw950.h3) • ibm power system e980 \(9080-m9s\) firmware (>= fw950.00 < fw950.h3)