IBMCVE-2026-16707
IBM PowerVM Hypervisor: out-of-bounds read
High8.2CVE-2026-16707 · Published Aug 19, 2026 · updated Aug 25, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| PowerVM Hypervisor Product | <= FW1120.00 | No fix yet |
| >= FW1110.00, <= FW1110.30 | No fix yet | |
| >= FW1060.00, <= FW1060.80 | No fix yet | |
| >= FW950.00, <= FW950.H2 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-125
More IBM advisories
All IBM| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 19 | IBM DS8900F (R9.4): information disclosure | High7.4 | No fix yet |
| Aug 19 | IBM DS8900F: authenticated user could create a user with privileged user | High7.5 | No fix yet |
| Aug 19 | IBM DS8900F (R9.4): authenticated user could read or modify another user's | Medium5.4 | No fix yet |
| Aug 19 | IBM PowerVM Hypervisor Platform KeyStore | Medium5.1 | No fix yet |
| Aug 19 | IBM PowerVM Hypervisor: local attacker could decrypt encrypted data | Medium5.3 | No fix yet |
| Aug 19 | IBM go-slug: local attacker could bypass | Medium5.5 | No fix yet |