Integer overflow in IBM Power Firmware

CVE-2026-19321

Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in the host firmware. An attacker with service access to the service processor can supply a carefully crafted command that could leak the contents of hardware registers that should be inaccessible to the service processor. Successful exploitation could result in limited confidentiality or availability impacts to the affected host system.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-19321?
CVE-2026-19321 is a medium-severity vulnerability in IBM Power Firmware, classified under Integer Overflow or Wraparound. CVSS score: 6.7/10. Published 2026-08-19.
How severe is CVE-2026-19321?
Medium severity. CVSS v3 base score is 6.7 out of 10.