CVE-2026-17042 : faille élevée ibm power system s922 \(9009-22g\)… (CVSS 7.3)

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.

Sévérité

Élevée (CVSS 7.3)

Vecteur CVSS

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

Exploitation active

Non signalée par la CISA

Publication

19 août 2026

Dernière mise à jour

25 août 2026

• 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

• Fiche CVE-2026-17042 sur le NVD (NIST)
• ibm.com/support/pages/node/7283240