CVE-2026-43221
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Kernel Memory Leak in IPMB Event Handler

Publication date: 2026-05-06

Last updated on: 2026-05-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ipmi: ipmb: initialise event handler read bytes IPMB doesn't use i2c reads, but the handler needs to set a value. Otherwise an i2c read will return an uninitialised value from the bus driver.
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Meta Information
Published
2026-05-06
Last Modified
2026-05-06
Generated
2026-06-16
AI Q&A
2026-05-06
EPSS Evaluated
2026-06-14
NVD
CVE-2026-43221
EUVD
EUVD-2026-27783
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability relates to the Linux kernel's IPMI (Intelligent Platform Management Interface) subsystem, specifically the IPMB (Intelligent Platform Management Bus) component. The issue is that the event handler for reading bytes was not properly initialized. Since IPMB does not use i2c reads, the handler still needs to set a value; otherwise, an i2c read operation could return an uninitialized value from the bus driver.

Impact Analysis

If the event handler is not properly initialized, i2c read operations might return uninitialized or unpredictable data. This could lead to incorrect behavior or data corruption in systems relying on IPMB communications within the Linux kernel.

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