IBM Power Systems Firmware 1060.001060.81 Mailbox RCE via Auth FSP
CVE-2026-96265 Published on October 12, 2026
IBM Power Systems Firmware Improper Memory Buffer Restriction
IBM Power Systems Firmware FW1060.00 through FW1060.81 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send a specially crafted mailbox message to read or modify arbitrary regions of Hostboot memory, 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.
Vulnerability Analysis
CVE-2026-96265 can be exploited with local system access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2026-96265 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-96265
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Affected Versions
IBM PowerVM Hypervisor:- Version FW1060.00, <= FW1060.81 is affected.