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Medium 5.1Published Aug 19, 2026
CVE-2026-4936Power System Insufficient Entropy
Updated under an hour ago ()
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It affects IBM PowerVM Hypervisor and 26 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-331
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- ibm
- NVD analysis
- Analyzed
- Record last updated
- Aug 20, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
IBM PowerVM Hypervisor ibm:power_systems_firmware | from FW1110.00 through FW1110.20; from FW1060.00 through FW1060.71; from FW950.00 through FW950.H2 | CNA record |
ibm power_system_s1122_(9824-22a)_firmware ibm:power_system_s1122_(9824-22a)_firmware | from fw1110.00 before fw1110.30; fw1120.00 | NVD |
ibm power_system_s1124_(9824-42a)_firmware ibm:power_system_s1124_(9824-42a)_firmware | from fw1110.00 before fw1110.30; fw1120.00 | NVD |
ibm power_system_s1122s_(9824-22b)_firmware ibm:power_system_s1122s_(9824-22b)_firmware | from fw1110.00 before fw1110.30; fw1120.00 | NVD |
ibm power_system_s1114_(9824-41b)_firmware ibm:power_system_s1114_(9824-41b)_firmware | from fw1110.00 before fw1110.30; fw1120.00 | NVD |
ibm power_system_l1122_(9856-22h)_firmware ibm:power_system_l1122_(9856-22h)_firmware | from fw1110.00 before fw1110.30; fw1120.00 | NVD |
ibm power_system_l1124_(9856-42h)_firmware ibm:power_system_l1124_(9856-42h)_firmware | from fw1110.00 before fw1110.30; fw1120.00 | NVD |
ibm power_system_e1150_(9043-mru)_firmware ibm:power_system_e1150_(9043-mru)_firmware | from fw1110.00 before fw1110.30; fw1120.00 | NVD |
ibm power_system_s1112_(9242-21b)_firmware ibm:power_system_s1112_(9242-21b)_firmware | fw1120.00 | NVD |
ibm power_system_s1112_(9242-21t)_firmware ibm:power_system_s1112_(9242-21t)_firmware | fw1120.00 | NVD |
ibm power_system_e1080_(9080-hex)_firmware ibm:power_system_e1080_(9080-hex)_firmware | from fw1060.00 before fw1060.72 | NVD |
ibm power_system_s1022_(9105-22a)_firmware ibm:power_system_s1022_(9105-22a)_firmware | from fw1060.00 before fw1060.72 | NVD |
ibm power_system_s1024_(9105-42a)_firmware ibm:power_system_s1024_(9105-42a)_firmware | from fw1060.00 before fw1060.72 | NVD |
ibm power_system_s1022s_(9105-22b)_firmware ibm:power_system_s1022s_(9105-22b)_firmware | from fw1060.00 before fw1060.72 | NVD |
ibm power_system_s1014_(9105-41b)_firmware ibm:power_system_s1014_(9105-41b)_firmware | from fw1060.00 before fw1060.72 | NVD |
ibm power_system_l1022_(9786-22h)_firmware ibm:power_system_l1022_(9786-22h)_firmware | from fw1060.00 before fw1060.72 | NVD |
ibm power_system_l1024_(9786-42h)_firmware ibm:power_system_l1024_(9786-42h)_firmware | from fw1060.00 before fw1060.72 | NVD |
ibm power_system_e1050_(9043-mrx)_firmware ibm:power_system_e1050_(9043-mrx)_firmware | from fw1060.00 before fw1060.72 | NVD |
ibm power_system_s1012_(9028-21b)_firmware ibm:power_system_s1012_(9028-21b)_firmware | from fw1060.00 before fw1060.72 | NVD |
ibm power_system_e1180_(9080-heu)_firmware ibm:power_system_e1180_(9080-heu)_firmware | from fw1110.00 before fw1110.30; fw1120.00 | NVD |
ibm power_system_s922_(9009-22g)_firmware ibm:power_system_s922_(9009-22g)_firmware | from fw950.00 before fw950.h3 | NVD |
ibm power_system_h922_(9223-22s)_firmware ibm:power_system_h922_(9223-22s)_firmware | from fw950.00 before fw950.h3 | NVD |
ibm power_system_s914_(9009-41g)_firmware ibm:power_system_s914_(9009-41g)_firmware | from fw950.00 before fw950.h3 | NVD |
ibm power_system_s924_(9009-42g)_firmware ibm:power_system_s924_(9009-42g)_firmware | from fw950.00 before fw950.h3 | NVD |
ibm power_system_h924_(9223-42s)_firmware ibm:power_system_h924_(9223-42s)_firmware | from fw950.00 before fw950.h3 | NVD |
ibm power_system_e950_(9040-mr9)_firmware ibm:power_system_e950_(9040-mr9)_firmware | from fw950.00 before fw950.h3 | NVD |
ibm power_system_e980_(9080-m9s)_firmware ibm:power_system_e980_(9080-m9s)_firmware | from fw950.00 before fw950.h3 | NVD |
References
- https://www.ibm.com/support/pages/node/7283890vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.