CVE-2026-19321 Power System Integer Overflow

Medium 6.7 Published 19 Aug 2026 Updated 20 Aug 2026

An attacker with service access can exploit an integer overflow to leak hardware register contents, impacting confidentiality and availability.

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-2026-19321?

CVE-2026-19321 is a medium-severity 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

Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in the host firmware. An attacker with service access to the service processor can supply a carefully crafted command that could leak the contents of hardware registers that should be inaccessible to the service processor. Successful exploitation could result in limited confidentiality or availability impacts to the affected host system.

Weakness: CWE-190

Which versions are affected by CVE-2026-19321?

It affects 19 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 L1022 \(9786-22h\) Firmware, Ibm Power System L1024 \(9786-42h\) Firmware and 13 more.

How do I fix CVE-2026-19321?

No fix has been published for CVE-2026-19321 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-19321 being exploited?

There is no known exploitation of CVE-2026-19321 in the wild and no public exploit code.

Sources

Also known as GHSA-xw82-fpcp-cg6q.