Buffer overflow in IBM Power Firmware

CVE-2026-19234

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 boot process image validation path. An attacker with service access to the service processor can supply a maliciously crafted code update image, allowing arbitrary code to be executed on the host system. Successful exploitation could result in a confidentiality, integrity, and availability impact to the affected host system.

Vulnerability class: Buffer 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

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-19234?
CVE-2026-19234 is a high-severity vulnerability in IBM Power Firmware, classified under Stack-based Buffer Overflow. CVSS score: 8.2/10. Published 2026-08-19.
How severe is CVE-2026-19234?
High severity. CVSS v3 base score is 8.2 out of 10.