CVE-2026-96261 IBM Power Systems Firmware Buffer Overflow
Authenticated attackers can cause host firmware crashes and potential memory corruption via crafted configuration data, impacting system integrity and availability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-96261?
CVE-2026-96261 is a high-severity memory corruption vulnerability in IBM PowerVM Hypervisor, published on 12 Oct 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 FW1060.00 through FW1060.81 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the service processor can write specially crafted configuration data, causing the host firmware boot stack to crash with possible memory corruption during system initialisation, resulting in an integrity and availability impact to the managed system.
Weakness: CWE-121
Which versions are affected by CVE-2026-96261?
How do I fix CVE-2026-96261?
No fix has been published for CVE-2026-96261 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-2026-96261 being exploited?
There is no known exploitation of CVE-2026-96261 in the wild and no public exploit code.
Sources
Also known as GHSA-4mp3-cxqr-qxhw.