CVE-2026-18870
Analyzed Analyzed - Analysis Complete

IBM PowerVM Hypervisor Out-of-Bounds Read Vulnerability

Publication date: 2026-09-24

Last updated on: 2026-09-30

Assigner: IBM Corporation

Description
IBM PowerVM Hypervisor FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3 could allow a remote attacker to obtain sensitive information due to an out-of-bounds read.

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EPSS Scores

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Meta Information

Published
2026-09-24
Last Modified
2026-09-30
Generated
2026-10-14
AI Q&A
2026-09-24
EPSS Evaluated
2026-10-13
NVD
CVE-2026-18870
EUVD
EUVD-2026-86006

Affected Vendors & Products

Showing 34 associated CPEs
Vendor Product Version / Range
ibm power_system_s1122_(9824-22a)_firmware From fw1110.00 (inc) to fw1110.32 (exc)
ibm power_system_s1122_(9824-22a)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_s1124_(9824-42a)_firmware From fw1110.00 (inc) to fw1110.32 (exc)
ibm power_system_s1124_(9824-42a)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_s1122s_(9824-22b)_firmware From fw1110.00 (inc) to fw1110.32 (exc)
ibm power_system_s1122s_(9824-22b)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_s1114_(9824-41b)_firmware From fw1110.00 (inc) to fw1110.32 (exc)
ibm power_system_s1114_(9824-41b)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_l1122_(9856-22h)_firmware From fw1110.00 (inc) to fw1110.32 (exc)
ibm power_system_l1122_(9856-22h)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_l1124_(9856-42h)_firmware From fw1110.00 (inc) to fw1110.32 (exc)
ibm power_system_l1124_(9856-42h)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_e1150_(9043-mru)_firmware From fw1110.00 (inc) to fw1110.32 (exc)
ibm power_system_e1150_(9043-mru)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_s1112_(9242-21b)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_s1112_(9242-21t)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_e1080_(9080-hex)_firmware From fw1060.00 (inc) to fw1060.82 (exc)
ibm power_system_s1022_(9105-22a)_firmware From fw1060.00 (inc) to fw1060.82 (exc)
ibm power_system_s1024_(9105-42a)_firmware From fw1060.00 (inc) to fw1060.82 (exc)
ibm power_system_s1022s_(9105-22b)_firmware From fw1060.00 (inc) to fw1060.82 (exc)
ibm power_system_s1014_(9105-41b)_firmware From fw1060.00 (inc) to fw1060.82 (exc)
ibm power_system_l1022_(9786-22h)_firmware From fw1060.00 (inc) to fw1060.82 (exc)
ibm power_system_l1024_(9786-42h)_firmware From fw1060.00 (inc) to fw1060.82 (exc)
ibm power_system_e1050_(9043-mrx)_firmware From fw1060.00 (inc) to fw1060.82 (exc)
ibm power_system_s1012_(9028-21b)_firmware From fw1060.00 (inc) to fw1060.82 (exc)
ibm power_system_e1180_(9080-heu)_firmware From fw1110.00 (inc) to fw1110.32 (exc)
ibm power_system_e1180_(9080-heu)_firmware From fw1120.00 (inc) to fw1120.02 (exc)
ibm power_system_s922_(9009-22g)_firmware From fw950.00 (inc) to fw950.h4 (exc)
ibm power_system_h922_(9223-22s)_firmware From fw950.00 (inc) to fw950.h4 (exc)
ibm power_system_s914_(9009-41g)_firmware From fw950.00 (inc) to fw950.h4 (exc)
ibm power_system_s924_(9009-42g)_firmware From fw950.00 (inc) to fw950.h4 (exc)
ibm power_system_h924_(9223-42s)_firmware From fw950.00 (inc) to fw950.h4 (exc)
ibm power_system_e950_(9040-mr9)_firmware From fw950.00 (inc) to fw950.h4 (exc)
ibm power_system_e980_(9080-m9s)_firmware From fw950.00 (inc) to fw950.h4 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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Executive Summary

CVE-2026-18870 is a vulnerability in IBM PowerVM Hypervisor versions FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3. It allows a remote attacker to obtain sensitive information due to an out-of-bounds read issue.

Detection Guidance

Detecting this vulnerability requires checking the firmware version of the IBM PowerVM Hypervisor. Compare installed versions against affected ranges: FW1120.00-FW1120.01, FW1110.00-FW1110.31, FW1060.00-FW1060.81, FW950.00-FW950.H3. Use IBM's firmware management tools or commands like 'lsmcode -r' on AIX systems to list current firmware versions.

Impact Analysis

This vulnerability could allow an attacker to access sensitive data on systems running affected PowerVM Hypervisor versions. The impact includes potential exposure of confidential information, though the CVSS score of 4.3 suggests a medium severity level.

Compliance Impact

The vulnerability allows remote attackers to obtain sensitive information through an out-of-bounds read, which could lead to unauthorized data exposure. This may impact compliance with GDPR (General Data Protection Regulation) by potentially violating data protection principles, particularly if personal data is accessed. For HIPAA (Health Insurance Portability and Accountability Act), the exposure of sensitive health information could result in non-compliance with security requirements for protected health information.

Mitigation Strategies

Install the appropriate firmware updates provided by IBM for your Power System model. Check IBM Support page for specific update instructions. No workarounds exist, so applying official patches is critical to remediate the out-of-bounds read vulnerability.

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