CVE-2026-15961 Power System Information Disclosure

Medium 5.2 Published 19 Aug 2026 Updated 20 Aug 2026

A local attacker can exploit improper format string handling in IBM PowerVM to disclose sensitive information or cause a denial of service.

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-2026-15961?

CVE-2026-15961 is a medium-severity vulnerability in IBM PowerVM Hypervisor, 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 PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 IBM PowerVM could allow a local attacker to obtain sensitive information or cause a denial of service due to improper control of format strings.

Weakness: CWE-134

Which versions are affected by CVE-2026-15961?

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-2026-15961?

No fix has been published for CVE-2026-15961 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-15961 being exploited?

There is no known exploitation of CVE-2026-15961 in the wild and no public exploit code.

Sources

Also known as GHSA-8qq5-wpjc-v6g2.