CVE-2026-96265
High
Description
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.
SeverityHigh
CVSS8.2
Exploit probability—
Product
Ibm Powervm Hypervisor
PublishedOct 12, 2026
First seenOct 12, 2026
Weakness typeCWE-119Memory buffer bounds error
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ibm powervm_hypervisor | FW1060.00 ≤ v ≤ FW1060.81 | — |
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