CVE-2026-11885

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PowerVM Hypervisor Memory Corruption via Malicious Hypervisor Call

Publication date: 2026-07-30

Last updated on: 2026-07-30

Assigner: IBM Corporation

Description

IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1 A carefully crafted OS hypervisor call can cause the PowerVM hypervisor to crash or compromise OS memory integrity.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-30

Last Modified

2026-07-30

Generated

2026-07-31

AI Q&A

2026-07-31

EPSS Evaluated

N/A

NVD

CVE-2026-11885

EUVD

EUVD-2026-51238

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	powervm_hypervisor	From FW1110.00 (inc) to FW1110.20 (inc)
ibm	powervm_hypervisor	From FW1060.00 (inc) to FW1060.71 (inc)
ibm	powervm_hypervisor	From FW950.00 (inc) to FW950.H1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-120	The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Attack-Flow Graph

Executive Summary

This vulnerability affects IBM PowerVM Hypervisor versions FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1. A specially crafted OS hypervisor call could crash the hypervisor or compromise the memory integrity of the operating system.

Detection Guidance

Detection of this vulnerability requires monitoring for hypervisor crashes or memory integrity issues caused by crafted OS hypervisor calls. Check for unexpected system reboots, error logs in the PowerVM hypervisor, or memory corruption alerts. No specific commands are provided in the available context.

Impact Analysis

The vulnerability could lead to hypervisor crashes, causing service disruptions. It may also allow unauthorized memory access, potentially leading to data leaks or system compromise if exploited by an attacker with local access.

Compliance Impact

This vulnerability could lead to hypervisor crashes or memory integrity compromise, potentially exposing sensitive data processed by affected IBM PowerVM systems. Such incidents may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data security) by enabling unauthorized access or data breaches.

Mitigation Strategies

Apply the latest firmware updates from IBM for PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1 to patch the vulnerability.

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