CVE-2026-16707

IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send a specially crafted mailbox message to read or modify arbitrary regions of Hostboot memory, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.

• 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)