CVE-2026-64589
Received Received - Intake

NULL-pointer dereference in Linux kernel i2c core

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix NULL-deref on adapter registration failure If adapter registration ever fails the release callback would trigger a NULL-pointer dereference as the completion struct has not been initialised. Note that before the offending commit this would instead have resulted in a minor memory leak of the adapter name.

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Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-64589
EUVD
EUVD-2026-53776

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel occurs when an I2C adapter registration fails. The system attempts to call a release function that dereferences a NULL pointer because a completion structure was not initialized. Before the fix, this would have caused a minor memory leak of the adapter name instead.

Detection Guidance

This vulnerability involves a NULL-pointer dereference during i2c adapter registration failure in the Linux kernel. Detection requires checking kernel logs for i2c-related errors or crashes during adapter registration. No specific commands are provided in the context.

Impact Analysis

If exploited, this could lead to a system crash due to a NULL-pointer dereference when adapter registration fails. It may cause kernel instability or denial of service in affected systems.

Mitigation Strategies

Apply the latest Linux kernel updates to resolve this issue. Monitor kernel logs for i2c adapter registration failures. Ensure proper error handling in i2c driver code if you are developing or maintaining such drivers.

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