CVE-2026-16707: CWE-125 Out-of-bounds Read in IBM PowerVM Hypervisor
CVE-2026-16707 is a high-severity vulnerability in IBM PowerVM Hypervisor affecting specific firmware versions. It involves an out-of-bounds read in the service processor mailbox interface, allowing an authenticated attacker with service-level access to read or modify arbitrary Hostboot memory regions. This can compromise the host firmware boot stack and the hypervisor loaded by it, 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 vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the Flexible Service Processor (FSP) can send specially crafted mailbox messages to perform out-of-bounds reads or writes on Hostboot memory. This compromises the host firmware boot stack and the hypervisor, resulting in a complete compromise of the managed system's confidentiality, integrity, and availability. The vulnerability is identified as CWE-125 (Out-of-bounds Read) and has a CVSS v3.1 score of 8.2, indicating high severity. No patch or remediation information is currently available.
Potential Impact
Successful exploitation allows an attacker with authenticated service-level access to read or modify arbitrary memory regions in Hostboot, compromising the host firmware boot stack and the hypervisor. This leads to a full compromise of confidentiality, integrity, and availability of the managed system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been disclosed at this time.
CVE-2026-16707: CWE-125 Out-of-bounds Read in IBM PowerVM Hypervisor
Description
CVE-2026-16707 is a high-severity vulnerability in IBM PowerVM Hypervisor affecting specific firmware versions. It involves an out-of-bounds read in the service processor mailbox interface, allowing an authenticated attacker with service-level access to read or modify arbitrary Hostboot memory regions. This can compromise the host firmware boot stack and the hypervisor loaded by it, impacting confidentiality, integrity, and availability of the managed system.
CVSS v3.1
Score 8.2high
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 vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the Flexible Service Processor (FSP) can send specially crafted mailbox messages to perform out-of-bounds reads or writes on Hostboot memory. This compromises the host firmware boot stack and the hypervisor, resulting in a complete compromise of the managed system's confidentiality, integrity, and availability. The vulnerability is identified as CWE-125 (Out-of-bounds Read) and has a CVSS v3.1 score of 8.2, indicating high severity. No patch or remediation information is currently available.
Potential Impact
Successful exploitation allows an attacker with authenticated service-level access to read or modify arbitrary memory regions in Hostboot, compromising the host firmware boot stack and the hypervisor. This leads to a full compromise of confidentiality, integrity, and availability of the managed system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been disclosed at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-23T01:58:36.625Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a86109dacd9273b4993ac99
Added to database: 08/19/2026, 20:22:53 UTC
Last enriched: 08/19/2026, 20:37:13 UTC
Last updated: 08/19/2026, 20:38:21 UTC
Views: 4
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