CVE-2026-17494 Power System Buffer Overflow
An attacker with BMC service access can execute arbitrary code on the host system via a buffer overflow, gaining full control over the server and partitions.
- 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-2026-17494?
CVE-2026-17494 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, and FW1110.00 through FW1110.30 is affected by a vulnerability in the interface between the BMC and the host system. An attacker with service access to the BMC can send a specially crafted command, allowing arbitrary code to be executed on the host system, giving full control over the host system and all hosted partitions, resulting in a confidentiality, integrity, and availability impact.
Weakness: CWE-121
Which versions are affected by CVE-2026-17494?
It affects 10 products.
Products include Ibm Power System E1150 \(9043-Mru\) Firmware, Ibm Power System E1180 \(9080-Heu\) Firmware, Ibm Power System L1122 \(9856-22h\) Firmware, Ibm Power System L1124 \(9856-42h\) Firmware, Ibm Power System S1112 \(9242-21b\) Firmware, Ibm Power System S1112 \(9242-21t\) Firmware and 4 more.
How do I fix CVE-2026-17494?
No fix has been published for CVE-2026-17494 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-2026-17494 being exploited?
There is no known exploitation of CVE-2026-17494 in the wild and no public exploit code.
Sources
Also known as GHSA-399g-qpj2-9x43.