CVE-2026-18871
Last modified
CVE-2026-18871 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. 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.. EPSS estimates a 0.11% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ibm | Power System S1122 \(9824-22a\) Firmware | >= fw1110.00, < fw1110.31 |
| Ibm | Power System S1122 \(9824-22a\) Firmware | fw1120.00 |
| Ibm | Power System S1124 \(9824-42a\) Firmware | >= fw1110.00, < fw1110.31 |
| Ibm | Power System S1124 \(9824-42a\) Firmware | fw1120.00 |
| Ibm | Power System S1122s \(9824-22b\) Firmware | >= fw1110.00, < fw1110.31 |
| Ibm | Power System S1122s \(9824-22b\) Firmware | fw1120.00 |
| Ibm | Power System S1114 \(9824-41b\) Firmware | >= fw1110.00, < fw1110.31 |
| Ibm | Power System S1114 \(9824-41b\) Firmware | fw1120.00 |
| Ibm | Power System L1122 \(9856-22h\) Firmware | >= fw1110.00, < fw1110.31 |
| Ibm | Power System L1122 \(9856-22h\) Firmware | fw1120.00 |
| Ibm | Power System L1124 \(9856-42h\) Firmware | >= fw1110.00, < fw1110.31 |
| Ibm | Power System L1124 \(9856-42h\) Firmware | fw1120.00 |
| Ibm | Power System E1150 \(9043-Mru\) Firmware | >= fw1110.00, < fw1110.31 |
| Ibm | Power System E1150 \(9043-Mru\) Firmware | fw1120.00 |
| Ibm | Power System S1112 \(9242-21b\) Firmware | fw1120.00 |
| Ibm | Power System S1112 \(9242-21t\) Firmware | fw1120.00 |
| Ibm | Power System E1080 \(9080-Hex\) Firmware | >= fw1060.00, < fw1060.81 |
| Ibm | Power System S1022 \(9105-22a\) Firmware | >= fw1060.00, < fw1060.81 |
| Ibm | Power System S1024 \(9105-42a\) Firmware | >= fw1060.00, < fw1060.81 |
| Ibm | Power System S1022s \(9105-22b\) Firmware | >= fw1060.00, < fw1060.81 |
| Ibm | Power System S1014 \(9105-41b\) Firmware | >= fw1060.00, < fw1060.81 |
| Ibm | Power System L1022 \(9786-22h\) Firmware | >= fw1060.00, < fw1060.81 |
| Ibm | Power System L1024 \(9786-42h\) Firmware | >= fw1060.00, < fw1060.81 |
| Ibm | Power System E1050 \(9043-Mrx\) Firmware | >= fw1060.00, < fw1060.81 |
| Ibm | Power System S1012 \(9028-21b\) Firmware | >= fw1060.00, < fw1060.81 |
| Ibm | Power System E1180 \(9080-Heu\) Firmware | >= fw1110.00, < fw1110.31 |
| Ibm | Power System E1180 \(9080-Heu\) Firmware | fw1120.00 |
References
- https://www.ibm.com/support/pages/node/7283238Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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