CVE-2026-4936

published 2026-08-19

CVE-2026-4936: 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…

Priority P4 28 medium 6.2 CVSS 3.1

AV A AC L PR H UI N S C C H I N A N

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.

Affected

36 ranges · showing 25

Vendor	Product	Version range	Fixed in
ibm	power_system_e1050_firmware	>= fw1060.00 < fw1060.72	fw1060.72
ibm	power_system_e1080_firmware	>= fw1060.00 < fw1060.72	fw1060.72
ibm	power_system_e1150_firmware	—	—
ibm	power_system_e1150_firmware	>= fw1110.00 < fw1110.30	fw1110.30
ibm	power_system_e1180_firmware	—	—
ibm	power_system_e1180_firmware	>= fw1110.00 < fw1110.30	fw1110.30
ibm	power_system_e950_firmware	>= fw950.00 < fw950.h3	fw950.h3
ibm	power_system_e980_firmware	>= fw950.00 < fw950.h3	fw950.h3
ibm	power_system_h922_firmware	>= fw950.00 < fw950.h3	fw950.h3
ibm	power_system_h924_firmware	>= fw950.00 < fw950.h3	fw950.h3
ibm	power_system_l1022_firmware	>= fw1060.00 < fw1060.72	fw1060.72
ibm	power_system_l1024_firmware	>= fw1060.00 < fw1060.72	fw1060.72
ibm	power_system_l1122_firmware	—	—
ibm	power_system_l1122_firmware	>= fw1110.00 < fw1110.30	fw1110.30
ibm	power_system_l1124_firmware	—	—
ibm	power_system_l1124_firmware	>= fw1110.00 < fw1110.30	fw1110.30
ibm	power_system_s1012_firmware	>= fw1060.00 < fw1060.72	fw1060.72
ibm	power_system_s1014_firmware	>= fw1060.00 < fw1060.72	fw1060.72
ibm	power_system_s1022_firmware	>= fw1060.00 < fw1060.72	fw1060.72
ibm	power_system_s1022s_firmware	>= fw1060.00 < fw1060.72	fw1060.72
ibm	power_system_s1024_firmware	>= fw1060.00 < fw1060.72	fw1060.72
ibm	power_system_s1112_firmware	—	—
ibm	power_system_s1114_firmware	—	—
ibm	power_system_s1114_firmware	>= fw1110.00 < fw1110.30	fw1110.30
ibm	power_system_s1122_firmware	—	—

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