CVE-2026-4936

Published Aug 19, 2026

Last updated a day ago

Overview

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.
Source
psirt@us.ibm.com
NVD status
Analyzed
Products
power_system_s1122_\(9824-22a\)_firmware, power_system_s1124_\(9824-42a\)_firmware, power_system_s1122s_\(9824-22b\)_firmware, power_system_s1114_\(9824-41b\)_firmware, power_system_l1122_\(9856-22h\)_firmware, power_system_l1124_\(9856-42h\)_firmware, power_system_e1150_\(9043-mru\)_firmware, power_system_s1112_\(9242-21b\)_firmware, power_system_s1112_\(9242-21t\)_firmware, power_system_e1080_\(9080-hex\)_firmware, power_system_s1022_\(9105-22a\)_firmware, power_system_s1024_\(9105-42a\)_firmware, power_system_s1022s_\(9105-22b\)_firmware, power_system_s1014_\(9105-41b\)_firmware, power_system_l1022_\(9786-22h\)_firmware, power_system_l1024_\(9786-42h\)_firmware, power_system_e1050_\(9043-mrx\)_firmware, power_system_s1012_\(9028-21b\)_firmware, power_system_e1180_\(9080-heu\)_firmware, power_system_s922_\(9009-22g\)_firmware, power_system_h922_\(9223-22s\)_firmware, power_system_s914_\(9009-41g\)_firmware, power_system_s924_\(9009-42g\)_firmware, power_system_h924_\(9223-42s\)_firmware, power_system_e950_\(9040-mr9\)_firmware, power_system_e980_\(9080-m9s\)_firmware

Risk scores

CVSS 3.1

Type
Primary
Base score
6.2
Impact score
4
Exploitability score
1.7
Vector string
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Severity
MEDIUM

Weaknesses

psirt@us.ibm.com
CWE-331

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.