IPMI Event Message Buffer Response Validation Flaw

Publication date: 2026-05-28

Last updated on: 2026-06-24

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: ipmi: Check event message buffer response for bad data The event message buffer response data size got checked later when processing, but check it right after the response comes back. It appears some BMCs may return an empty message instead of an error when fetching events. There are apparently some new BMCs that make this error, so we need to compensate.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-05-28

Last Modified

2026-06-24

Generated

2026-07-08

AI Q&A

2026-05-28

EPSS Evaluated

2026-07-06

NVD

CVE-2026-46128

EUVD

EUVD-2026-32887

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	From 6.13 (inc) to 6.18.30 (exc)
linux	linux_kernel	From 5.16 (inc) to 6.1.175 (exc)
linux	linux_kernel	From 5.11 (inc) to 5.15.209 (exc)
linux	linux_kernel	From 6.19 (inc) to 7.0.7 (exc)
linux	linux_kernel	From 6.7 (inc) to 6.12.88 (exc)
linux	linux_kernel	From 6.2 (inc) to 6.6.140 (exc)
linux	linux_kernel	From 2.6.12.1 (inc) to 5.10.258 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's IPMI (Intelligent Platform Management Interface) implementation. It involves improper checking of the event message buffer response data size. Specifically, the size of the response data was only checked later during processing, rather than immediately after receiving the response. Some Baseboard Management Controllers (BMCs) may return an empty message instead of an error when fetching events, which could lead to issues if not properly handled.

Impact Analysis

If the Linux kernel does not properly check the event message buffer response immediately, it may process bad or empty data from certain BMCs. This could potentially lead to incorrect event handling or system instability related to IPMI event processing.

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