CVE-2026-17093 Power System Buffer Overflow

High 8.2 Published 19 Aug 2026 Updated 21 Aug 2026

An attacker with service-level access can exploit a buffer overflow in firmware configuration parsing to compromise the host firmware boot stage and subsequent loads.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-17093?

CVE-2026-17093 is a high-severity memory corruption vulnerability in IBM Power Systems Firmware, published on 19 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware configuration parsing. An attacker with service-level access to the BMC/FSP can supply specially crafted configuration data, compromising the host firmware boot stage and everything subsequently loaded by it, resulting in a confidentiality, integrity, and availability impact to the managed system.

Weakness: CWE-121

Which versions are affected by CVE-2026-17093?

It affects 29 products.

Products include Ibm Power Hardware Management Console \(7063-Cr2\) Firmware, Ibm Power System Ac922 \(8335-Gth\) Firmware, Ibm Power System Ac922 \(8335-Gtx\) Firmware, Ibm Power System E1050 \(9043-Mrx\) Firmware, Ibm Power System E1080 \(9080-Hex\) Firmware, Ibm Power System E1150 \(9043-Mru\) Firmware and 23 more.

How do I fix CVE-2026-17093?

No fix has been published for CVE-2026-17093 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-17093 being exploited?

There is no known exploitation of CVE-2026-17093 in the wild and no public exploit code.

Sources

Also known as GHSA-7w87-459r-rfjg.