CVE-2026-17091

high

Description

IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the PowerVM hypervisor call interface. An attacker with root access to a guest partition can issue a specially crafted hypervisor call to inject an arbitrary amount of data into hypervisor or partition memory, resulting in either a crash causing a full platform re-IPL and terminating all hosted partitions, or corruption of hypervisor or partition memory. The PowerVM hypervisor will restart automatically; however, repeated exploitation could result in a sustained availability impact. Successful exploitation results in an integrity and availability impact to the managed system.

References

https://www.ibm.com/support/pages/node/7283229

Details

Source: Mitre, NVD

Published: 2026-08-19

Updated: 2026-08-25

Risk Information

CVSS v2

Base Score: 6.2

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 8.4

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

Severity: High

EPSS

EPSS: 0.00116