CVE-2026-17042

HighCVSS 7.3/10Last modified Aug 25, 2026

Description

IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention — clearing NVRAM via the service processor — to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. Successful exploitation results in an integrity and availability impact to the managed system.

Metrics

CVSS 3.1 7.3/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H

Weakness enumeration

CWE-125

Affected software

No affected versions have been published.

Timeline

Published: Aug 19, 2026
Last modified: Aug 25, 2026
NVD status: Analyzed

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