CVE-2026-4936

medium

Description

IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data.

References

https://www.ibm.com/support/pages/node/7283890

Details

Source: Mitre, NVD

Published: 2026-08-19

Updated: 2026-08-25

Risk Information

CVSS v2

Base Score: 5

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

Severity: Medium

CVSS v3

Base Score: 6.2

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

Severity: Medium

EPSS

EPSS: 0.001