CVE-2026-17042 — Power System Out-of-bounds Read

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
IBM / Power Systems Firmware	affected FW950.00 through FW950.H2; affected OP940.00 through OP940.a1; affected OP940.00 through OP940.81

CWE

CWE-125

References

https://www.ibm.com/support/pages/node/7283240

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.