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 host firmware NVRAM parsing.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.10%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.3 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H
- EPSS
- 0.10% probability · 1th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- ibm/power system s922 \(9009-22g\) firmware · ibm/power system h922 \(9223-22s\) firmware · ibm/power system s914 \(9009-41g\) firmware · ibm/power system s924 \(9009-42g\) firmware · ibm/power system h924 \(9223-42s\) firmware · ibm/power system e950 \(9040-mr9\) firmware · ibm/power system e980 \(9080-m9s\) firmware · ibm/power system ac922 \(8335-gth\) firmware · ibm/power system ac922 \(8335-gtx\) firmware · ibm/power hardware management console \(7063-cr2\) firmware
- Source
- psirt@us.ibm.com
References
- https://www.ibm.com/support/pages/node/7283240Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.