IBMCVE-2026-16933
IBM Power Systems Firmware: integer overflow
High8.2CVE-2026-16933 · Published Aug 19, 2026 · updated Aug 25, 2026
IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 through OP940.81 (Power HMC) is affected by a vulnerability in the interface between the BMC/FSP and the host system. An attacker with service account or root access to the BMC/FSP can read and write arbitrary regions of host system memory, giving full control over the host system and all hosted partitions, resulting in a confidentiality, integrity, and availability impact.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Power Systems Firmware 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-190
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 |