High 7.3Published Aug 19, 2026

CVE-2026-18871Power System Buffer Overflow

Updated under an hour ago (Oct 27, 2026, 4:30 AM ET)

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It affects IBM PowerVM Hypervisor and 19 other products. Add what you run to find out whether that includes you.

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Every CVE for IBM PowerVM Hypervisor

Exploited in the last 30 days

IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the service processor can write specially crafted configuration data, causing the host firmware boot stack to crash with possible memory corruption during system initialisation, resulting in an integrity and availability impact to the managed system.

CVSS: 7.3 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H
Weakness (CWE): CWE-121
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

Affected products

IBM PowerVM Hypervisor ibm:power_systems_firmware	FW1120.00; from FW1110.00 through FW1110.30; from FW1060.00 through FW1060.80	CNA record
ibm power_system_s1122_(9824-22a)_firmware ibm:power_system_s1122_(9824-22a)_firmware	from fw1110.00 before fw1110.31; fw1120.00	NVD
ibm power_system_s1124_(9824-42a)_firmware ibm:power_system_s1124_(9824-42a)_firmware	from fw1110.00 before fw1110.31; fw1120.00	NVD
ibm power_system_s1122s_(9824-22b)_firmware ibm:power_system_s1122s_(9824-22b)_firmware	from fw1110.00 before fw1110.31; fw1120.00	NVD
ibm power_system_s1114_(9824-41b)_firmware ibm:power_system_s1114_(9824-41b)_firmware	from fw1110.00 before fw1110.31; fw1120.00	NVD
ibm power_system_l1122_(9856-22h)_firmware ibm:power_system_l1122_(9856-22h)_firmware	from fw1110.00 before fw1110.31; fw1120.00	NVD
ibm power_system_l1124_(9856-42h)_firmware ibm:power_system_l1124_(9856-42h)_firmware	from fw1110.00 before fw1110.31; fw1120.00	NVD
ibm power_system_e1150_(9043-mru)_firmware ibm:power_system_e1150_(9043-mru)_firmware	from fw1110.00 before fw1110.31; 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
1–10 of 20

References

References

https://www.ibm.com/support/pages/node/7283238	vendor-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.