CVE-2026-18871

Published: Aug 19, 2026Modified: Aug 25, 2026

7.3

Vector

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

Exploitability: 2.0 / Impact: 4.7

Source: psirt@us.ibm.com (Secondary)

Description

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.

Affected (27)

Ibm

19 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

Configuration A

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1122 (9824 22a) Firmware	From fw1110.00 to fw1110.31
Ibm Power System S1122 (9824 22a) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System S1122 (9824 22a)	All versions

Configuration B

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1124 (9824 42a) Firmware	From fw1110.00 to fw1110.31
Ibm Power System S1124 (9824 42a) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System S1124 (9824 42a)	All versions

Configuration C

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1122s (9824 22b) Firmware	From fw1110.00 to fw1110.31
Ibm Power System S1122s (9824 22b) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System S1122s (9824 22b)	All versions

Configuration D

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1114 (9824 41b) Firmware	From fw1110.00 to fw1110.31
Ibm Power System S1114 (9824 41b) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System S1114 (9824 41b)	All versions

Configuration E

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System L1122 (9856 22h) Firmware	From fw1110.00 to fw1110.31
Ibm Power System L1122 (9856 22h) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System L1122 (9856 22h)	All versions

Configuration F

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System L1124 (9856 42h) Firmware	From fw1110.00 to fw1110.31
Ibm Power System L1124 (9856 42h) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System L1124 (9856 42h)	All versions

Configuration G

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System E1150 (9043 Mru) Firmware	From fw1110.00 to fw1110.31
Ibm Power System E1150 (9043 Mru) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System E1150 (9043 Mru)	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1112 (9242 21b) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System S1112 (9242 21b)	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1112 (9242 21t) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System S1112 (9242 21t)	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System E1080 (9080 Hex) Firmware	From fw1060.00 to fw1060.81

Running on/with	Platform Versions
Ibm Power System E1080 (9080 Hex)	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1022 (9105 22a) Firmware	From fw1060.00 to fw1060.81

Running on/with	Platform Versions
Ibm Power System S1022 (9105 22a)	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1024 (9105 42a) Firmware	From fw1060.00 to fw1060.81

Running on/with	Platform Versions
Ibm Power System S1024 (9105 42a)	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1022s (9105 22b) Firmware	From fw1060.00 to fw1060.81

Running on/with	Platform Versions
Ibm Power System S1022s (9105 22b)	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1014 (9105 41b) Firmware	From fw1060.00 to fw1060.81

Running on/with	Platform Versions
Ibm Power System S1014 (9105 41b)	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System L1022 (9786 22h) Firmware	From fw1060.00 to fw1060.81

Running on/with	Platform Versions
Ibm Power System L1022 (9786 22h)	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System L1024 (9786 42h) Firmware	From fw1060.00 to fw1060.81

Running on/with	Platform Versions
Ibm Power System L1024 (9786 42h)	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System E1050 (9043 Mrx) Firmware	From fw1060.00 to fw1060.81

Running on/with	Platform Versions
Ibm Power System E1050 (9043 Mrx)	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System S1012 (9028 21b) Firmware	From fw1060.00 to fw1060.81

Running on/with	Platform Versions
Ibm Power System S1012 (9028 21b)	All versions

Configuration S

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Ibm Power System E1180 (9080 Heu) Firmware	From fw1110.00 to fw1110.31
Ibm Power System E1180 (9080 Heu) Firmware	Version fw1120.00

Running on/with	Platform Versions
Ibm Power System E1180 (9080 Heu)	All versions

Related CWEs

CWE-121

Stack-based Buffer Overflow

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

References (1)

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

Source: psirt@us.ibm.com

Vendor Advisory

Timeline

No history available yet.