Integer overflow in IBM Power Systems Firmware
CVE-2026-16933
IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 through OP940.81 (Power HMC) is affected by a vulnerability in the interface between the BMC/FSP and the host system. An attacker with service account or root access to the BMC/FSP can read and write arbitrary regions of host system memory, giving full control over the host system and all hosted partitions, resulting in a confidentiality, integrity, and availability impact.
Vulnerability class: Integer Overflow
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Ibm Power Systems Firmware — versions FW1120.00
Weakness classification (CWE)
References
- psirt@us.ibm.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-16933?
- CVE-2026-16933 is a high-severity vulnerability in IBM Power Systems Firmware, classified under Integer Overflow or Wraparound. CVSS score: 8.2/10. Published 2026-08-19.
- How severe is CVE-2026-16933?
- High severity. CVSS v3 base score is 8.2 out of 10.