Vulnerability · Published Oct 12, 2026 · Assigned by ibm

CVE-2026-96263IBM 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 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.

Affected products (as reported)

Vendor	Product	Versions
IBM	PowerVM Hypervisor	FW1120.00 – through FW1120.01FW1110.00 – through FW1110.31FW1060.00 – 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/7290129 vendor-advisory, patch