CVE-2026-16707: CWE-125 Out-of-bounds Read in IBM PowerVM Hypervisor
CVE-2026-16707 is an out-of-bounds read vulnerability in IBM PowerVM Hypervisor's service processor mailbox interface. It affects multiple firmware versions and allows an authenticated attacker with service-level access to the Flexible Service Processor (FSP) to read or modify arbitrary Hostboot memory regions. Exploitation compromises the host firmware boot stack and the hypervisor loaded thereafter, impacting confidentiality, integrity, and availability of the managed system.
AI Analysis
Technical Summary
IBM PowerVM Hypervisor versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 contain a CWE-125 out-of-bounds read vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send crafted mailbox messages to read or modify arbitrary Hostboot memory areas, compromising the host firmware boot stack and the hypervisor. This leads to a complete compromise of confidentiality, integrity, and availability of the affected system.
Potential Impact
Successful exploitation allows an attacker with high privileges (authenticated service-level access) to read or modify critical firmware memory, compromising the boot process and hypervisor integrity. This results in high impact on confidentiality, integrity, and availability of the managed system.
Mitigation Recommendations
No patch or official remediation information is provided in the input data. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated service-level access to the FSP to trusted personnel only.
CVE-2026-16707: CWE-125 Out-of-bounds Read in IBM PowerVM Hypervisor
Description
CVE-2026-16707 is an out-of-bounds read vulnerability in IBM PowerVM Hypervisor's service processor mailbox interface. It affects multiple firmware versions and allows an authenticated attacker with service-level access to the Flexible Service Processor (FSP) to read or modify arbitrary Hostboot memory regions. Exploitation compromises the host firmware boot stack and the hypervisor loaded thereafter, impacting confidentiality, integrity, and availability of the managed system.
CVSS v3.1
Score 8.2high
Affected software
IBM
PowerVM Hypervisor
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
IBM PowerVM Hypervisor versions FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 contain a CWE-125 out-of-bounds read vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send crafted mailbox messages to read or modify arbitrary Hostboot memory areas, compromising the host firmware boot stack and the hypervisor. This leads to a complete compromise of confidentiality, integrity, and availability of the affected system.
Potential Impact
Successful exploitation allows an attacker with high privileges (authenticated service-level access) to read or modify critical firmware memory, compromising the boot process and hypervisor integrity. This results in high impact on confidentiality, integrity, and availability of the managed system.
Mitigation Recommendations
No patch or official remediation information is provided in the input data. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated service-level access to the FSP to trusted personnel only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-23T01:58:36.625Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a86109dacd9273b4993ac99
Added to database: 08/19/2026, 20:22:53 UTC
Last enriched: 09/11/2026, 05:17:09 UTC
Last updated: 10/03/2026, 14:46:05 UTC
Views: 68
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