CVE-2026-17494: Power System Buffer Overflow

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-19 · updated 2026-08-25
Weakness: CWE-121

Description

IBM Power Systems Firmware FW1120.00, and FW1110.00 through FW1110.30 is affected by a vulnerability in the interface between the BMC and the host system. An attacker with service access to the BMC can send a specially crafted command, allowing arbitrary code to be executed on the host system, giving full control over the host system and all hosted partitions, resulting in a confidentiality, integrity, and availability impact.

Affected products

IBM Power System E1150 (9043-Mru) Firmware: from fw1110.00 before fw1110.31; fw1120.00 — fixed in fw1110.31
IBM Power System E1180 (9080-Heu) Firmware: from fw1110.00 before fw1110.31; fw1120.00 — fixed in fw1110.31
IBM Power System L1122 (9856-22H) Firmware: from fw1110.00 before fw1110.31; fw1120.00 — fixed in fw1110.31
IBM Power System L1124 (9856-42H) Firmware: from fw1110.00 before fw1110.31; fw1120.00 — fixed in fw1110.31
IBM Power System S1112 (9242-21B) Firmware: fw1120.00
IBM Power System S1112 (9242-21T) Firmware: fw1120.00
IBM Power System S1114 (9824-41B) Firmware: from fw1110.00 before fw1110.31; fw1120.00 — fixed in fw1110.31
IBM Power System S1122 (9824-22A) Firmware: from fw1110.00 before fw1110.31; fw1120.00 — fixed in fw1110.31
IBM Power System S1122S (9824-22B) Firmware: from fw1110.00 before fw1110.31; fw1120.00 — fixed in fw1110.31
IBM Power System S1124 (9824-42A) Firmware: from fw1110.00 before fw1110.31; fw1120.00 — fixed in fw1110.31

How to fix

Upgrade to a fixed version: IBM Power System E1150 (9043-Mru) Firmware fw1110.31; IBM Power System E1180 (9080-Heu) Firmware fw1110.31; IBM Power System L1122 (9856-22H) Firmware fw1110.31; IBM Power System L1124 (9856-42H) Firmware fw1110.31; IBM Power System S1114 (9824-41B) Firmware fw1110.31; IBM Power System S1122 (9824-22A) Firmware fw1110.31; IBM Power System S1122S (9824-22B) Firmware fw1110.31; IBM Power System S1124 (9824-42A) Firmware fw1110.31. Check the vendor advisory for mitigations.

References

https://www.ibm.com/support/pages/node/7283220

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