Vulnerability · Published Oct 12, 2026 · Assigned by ibm

CVE-2026-96266IBM Power Systems Firmware Buffer Overflow

High 8.2

In plain English

A high-severity stack buffer overflow in PowerVM Hypervisor from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.1%top 97.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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 FSP can write specially crafted configuration data to cause memory corruption in the host firmware boot stage during system IPL, compromising the host firmware boot stack and the hypervisor subsequently loaded by it. Successful exploitation results in a confidentiality, integrity, and availability impact to the managed system.

Affected products (as reported)

Vendor	Product	Versions
IBM	PowerVM Hypervisor	FW1060.00 – through FW1060.81

Weakness: CWE-121 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References

https://www.ibm.com/support/pages/node/7290128 vendor-advisory, patch