What is CVE-2026-96261?

CVE-2026-96261 is a high-severity vulnerability in IBM Powervm Hypervisor, classified under Stack-based Buffer Overflow. CVSS score: 7.3/10. Published 2026-10-12.

How severe is CVE-2026-96261?

High severity. CVSS v3 base score is 7.3 out of 10.

Buffer overflow in IBM Powervm Hypervisor

CVE-2026-96261

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.

Vulnerability class: Buffer Overflow

Published 2026-10-12.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM Powervm Hypervisor

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

www.ibm.com/support/pages/node/7290127 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-96261?: CVE-2026-96261 is a high-severity vulnerability in IBM Powervm Hypervisor, classified under Stack-based Buffer Overflow. CVSS score: 7.3/10. Published 2026-10-12.
How severe is CVE-2026-96261?: High severity. CVSS v3 base score is 7.3 out of 10.