CVE-2026-16707
Power System Out-of-bounds Read
- State
- Published
- Severity
- 8.2 High
- Published
- Aug 19, 2026
- Updated
- Aug 21, 2026
- Reserved
- Jul 23, 2026
Description
IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.2 High | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H | ibm |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
PowerVM HypervisorIBM |
|
References
- https://www.ibm.com/support/pages/node/7283235vendor-advisorypatch
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