CVE-2026-96266: IBM Power Systems Firmware Buffer Overflow
IBM Power Systems Firmware FW1060.00 through FW1060.81 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the FSP can write specially crafted configuration data to cause memory corruption in the host firmware boot stage during system IPL, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
IBM Power Systems Firmwareto a version that resolves this vulnerability.Fixed in FW1060.82(1060_199)
Event History
Frequently Asked Questions
Who is exposed to exploitation?
Managed systems running IBM Power Systems Firmware FW1060.00 through FW1060.81 are affected. Exploitation requires authenticated service-level access to the Flexible Service Processor (FSP).
When does the malicious configuration data take effect?
The crafted configuration data causes memory corruption during the host firmware boot stage when the system performs an initial program load (IPL). The resulting compromise can extend to the hypervisor loaded by the host firmware.
What level of impact can successful exploitation have?
Successful exploitation can compromise the host firmware boot stack and subsequently the hypervisor. This can affect confidentiality, integrity, and availability of the managed system.