CVE-2026-17042
Last modified
CVE-2026-17042 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. 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. EPSS estimates a 0.10% chance of exploitation in the next 30 days.
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
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ibm | Power System S922 \(9009-22g\) Firmware | >= fw950.00, < fw950.h3 |
| Ibm | Power System H922 \(9223-22s\) Firmware | >= fw950.00, < fw950.h3 |
| Ibm | Power System S914 \(9009-41g\) Firmware | >= fw950.00, < fw950.h3 |
| Ibm | Power System S924 \(9009-42g\) Firmware | >= fw950.00, < fw950.h3 |
| Ibm | Power System H924 \(9223-42s\) Firmware | >= fw950.00, < fw950.h3 |
| Ibm | Power System E950 \(9040-Mr9\) Firmware | >= fw950.00, < fw950.h3 |
| Ibm | Power System E980 \(9080-M9s\) Firmware | >= fw950.00, < fw950.h3 |
| Ibm | Power System Ac922 \(8335-Gth\) Firmware | >= op940, < op940.a2 |
| Ibm | Power System Ac922 \(8335-Gtx\) Firmware | >= op940, < op940.a2 |
| Ibm | Power Hardware Management Console \(7063-Cr2\) Firmware | >= op940, < op940.82 |
References
- https://www.ibm.com/support/pages/node/7283240Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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