CVE-2026-17504 This Power System update is being released to address

Medium 5.1 Published 24 Sep 2026 Updated 24 Sep 2026

A local attacker with root access can trigger an integer overflow in the partition firmware runtime, causing a crash and potential memory corruption.

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-2026-17504?

CVE-2026-17504 is a medium-severity vulnerability in IBM PowerVM Hypervisor, published on 24 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

IBM PowerVM Hypervisor FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3 is affected by a vulnerability in the partition firmware runtime. An attacker with root access to a partition can send a specially crafted request to the partition firmware runtime, causing it to crash with possible memory corruption.

Weakness: CWE-191

Which versions are affected by CVE-2026-17504?

It affects 26 products.

Products include Ibm Power System E1050 \(9043-Mrx\) Firmware, Ibm Power System E1080 \(9080-Hex\) Firmware, Ibm Power System E1150 \(9043-Mru\) Firmware, Ibm Power System E1180 \(9080-Heu\) Firmware, Ibm Power System E950 \(9040-Mr9\) Firmware, Ibm Power System E980 \(9080-M9s\) Firmware and 20 more.

How do I fix CVE-2026-17504?

No fix has been published for CVE-2026-17504 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-17504 being exploited?

There is no known exploitation of CVE-2026-17504 in the wild and no public exploit code.

Sources

Also known as GHSA-36hq-8wph-q8rm.