CVE-2026-18821

published 2026-08-19

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…

Priority P3 54 high 8.8 CVSS 3.1

AV A AC L PR N UI N S U C H I H A H

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

37 ranges · showing 25

Vendor	Product	Version range	Fixed in
ibm	power_system_e1050_firmware	>= fw1060.00 < fw1060.81	fw1060.81
ibm	power_system_e1080_firmware	>= fw1060.00 < fw1060.81	fw1060.81
ibm	power_system_e1150_firmware	—	—
ibm	power_system_e1150_firmware	>= fw1110.00 < fw1110.31	fw1110.31
ibm	power_system_e1180_firmware	—	—
ibm	power_system_e1180_firmware	>= fw1110.00 < fw1110.31	fw1110.31
ibm	power_system_e950_firmware	>= fw950.00 < fw950.h3	fw950.h3
ibm	power_system_e980_firmware	>= fw950.00 < fw950.h3	fw950.h3
ibm	power_system_h922_firmware	>= fw950.00 < fw950.h3	fw950.h3
ibm	power_system_h924_firmware	>= fw950.00 < fw950.h3	fw950.h3
ibm	power_system_l1022_firmware	>= fw1060.00 < fw1060.81	fw1060.81
ibm	power_system_l1024_firmware	>= fw1060.00 < fw1060.81	fw1060.81
ibm	power_system_l1122_firmware	—	—
ibm	power_system_l1122_firmware	>= fw1110.00 < fw1110.31	fw1110.31
ibm	power_system_l1124_firmware	—	—
ibm	power_system_l1124_firmware	>= fw1110.00 < fw1110.31	fw1110.31
ibm	power_system_s1012_firmware	>= fw1060.00 < fw1060.81	fw1060.81
ibm	power_system_s1014_firmware	>= fw1060.00 < fw1060.81	fw1060.81
ibm	power_system_s1022_firmware	>= fw1060.00 < fw1060.81	fw1060.81
ibm	power_system_s1022s_firmware	>= fw1060.00 < fw1060.81	fw1060.81
ibm	power_system_s1024_firmware	>= fw1060.00 < fw1060.81	fw1060.81
ibm	power_system_s1112_firmware	—	—
ibm	power_system_s1114_firmware	—	—
ibm	power_system_s1114_firmware	>= fw1110.00 < fw1110.31	fw1110.31
ibm	power_system_s1122_firmware	—	—

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