CVE-2026-17042
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…
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Ibm | Power System S922 \(9009-22g\) Firmware | from fw950.00 before fw950.h3 |
| Ibm | Power System H922 \(9223-22s\) Firmware | from fw950.00 before fw950.h3 |
| Ibm | Power System S914 \(9009-41g\) Firmware | from fw950.00 before fw950.h3 |
| Ibm | Power System S924 \(9009-42g\) Firmware | from fw950.00 before fw950.h3 |
| Ibm | Power System H924 \(9223-42s\) Firmware | from fw950.00 before fw950.h3 |
| Ibm | Power System E950 \(9040-Mr9\) Firmware | from fw950.00 before fw950.h3 |
| Ibm | Power System E980 \(9080-M9s\) Firmware | from fw950.00 before fw950.h3 |
| Ibm | Power System Ac922 \(8335-Gth\) Firmware | from op940 before op940.a2 |
| Ibm | Power System Ac922 \(8335-Gtx\) Firmware | from op940 before op940.a2 |
| Ibm | Power Hardware Management Console \(7063-Cr2\) Firmware | from op940 before op940.82 |