CVE-2026-96263 IBM Power Systems Firmware Buffer Overflow
Attackers with service processor access can execute arbitrary code on IBM Power Systems hosts via malicious firmware updates.
- 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-2026-96263?
CVE-2026-96263 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 FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, and FW1060.00 through FW1060.81 is affected by a vulnerability in the host firmware boot process image validation path. An attacker with service access to the service processor can supply a maliciously crafted code update image, allowing arbitrary code to be executed on the host system. Successful exploitation could result in a confidentiality, integrity, and availability impact to the affected host system.
Weakness: CWE-121
Which versions are affected by CVE-2026-96263?
How do I fix CVE-2026-96263?
No fix has been published for CVE-2026-96263 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-2026-96263 being exploited?
There is no known exploitation of CVE-2026-96263 in the wild and no public exploit code.
Sources
Also known as GHSA-7x99-v7wf-cwv4.