Description
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.
Published: 2026-08-19
Score: 7.5 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Customers with the products below should install FW1110.31(1110_134), FW1120.01(1120_167), or newer to remediate this vulnerability. Power 11 * IBM Power System E1180 (9080-HEU) Customers with the products below should install FW1110.31(1110_155), FW1120.01(1120_190), or newer to remediate this vulnerability. Power 11 * IBM Power System S1122 (9824-22A) * IBM Power System S1124 (9824-42A) * IBM Power System S1122s (9824-22B) * IBM Power System S1114 (9824-41B) * IBM Power System L1122 (9856-22H) * IBM Power System L1124 (9856-42H) * IBM Power System E1150 (9043-MRU) Customers with the products below should install FW1120.01(1120_190), or newer to remediate this vulnerability. Power 11 * IBM Power System S1112 (9242-21B, 9242-21T) Customers with the products below should install FW1060.81(1060_184), or newer to remediate this vulnerability. Power 10 * IBM Power System E1080 (9080-HEX) Customers with the products below should install  FW1060.81(1060_191), or newer to remediate this vulnerability. Power 10 * IBM Power System S1022 (9105-22A) * IBM Power System S1024 (9105-42A) * IBM Power System S1022s (9105-22B) * IBM Power System S1014 (9105-41B) * IBM Power System L1022 (9786-22H) * IBM Power System L1024 (9786-42H) * IBM Power System E1050 (9043-MRX) * IBM Power System S1012 (9028-21B) Customers with the products below should install FW950.H3(950_230) or newer to remediate this vulnerability. Power 9 * IBM Power System S922 (9009-22G) * IBM Power System H922 (9223-22S) * IBM Power System S914 (9009-41G) * IBM Power System S924 (9009-42G) * IBM Power System H924 (9223-42S) * IBM Power System E950 (9040-MR9) * IBM Power System E980 (9080-M9S) The images mentioned above can be located at IBM Fix Central : https://www.ibm.com/support/fixcentral/ https://www.ibm.com/support/fixcentral/

Tracking

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Advisories

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History

Wed, 19 Aug 2026 20:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Power System Out-of-bounds Write
First Time appeared Ibm
Ibm power Systems Firmware
Weaknesses CWE-787
CPEs cpe:2.3:o:ibm:power_systems_firmware:fw1060.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw1060.80:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw1110.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw1110.30:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw950.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_systems_firmware:fw950.h2:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm power Systems Firmware
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Ibm Power Systems Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published:

Updated: 2026-08-19T19:41:43.179Z

Reserved: 2026-08-04T13:21:06.083Z

Link: CVE-2026-18821

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-19T20:17:13.603

Modified: 2026-08-19T20:17:13.603

Link: CVE-2026-18821

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses