Vulnerability · Published Oct 12, 2026 · Assigned by ibm

CVE-2026-96262IBM 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 the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can send a specially crafted mailbox message to overflow host firmware runtime attribute storage, allowing arbitrary code to be executed in the host firmware runtime. This gives the attacker full access to the managed system's memory and hardware interfaces, resulting 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/7290125 vendor-advisory, patch