CVE-2026-45925
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Reference leak in Linux kernel thermal subsystem

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: thermal/of: Fix reference leak in thermal_of_cm_lookup() In thermal_of_cm_lookup(), tr_np is obtained via of_parse_phandle(), but never released. Use the __free(device_node) cleanup attribute to automatically release the node and fix the leak. [ rjw: Changelog edits ]
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-45925
EUVD
EUVD-2026-32391
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 is a reference leak in the Linux kernel's thermal subsystem, specifically in the function thermal_of_cm_lookup(). In this function, a device node (tr_np) is obtained using of_parse_phandle(), but it is never properly released, causing a resource leak.

The fix involves using the __free(device_node) cleanup attribute to automatically release the node and prevent the leak.

Impact Analysis

A reference leak like this can lead to increased memory usage over time, potentially causing resource exhaustion in the system running the Linux kernel. This may degrade system performance or stability, especially in environments where the thermal subsystem is frequently accessed.

Mitigation Strategies

The vulnerability is a reference leak in the Linux kernel's thermal_of_cm_lookup() function. To mitigate this vulnerability, you should update your Linux kernel to a version where this issue has been fixed.

The fix involves using the __free(device_node) cleanup attribute to automatically release the node and prevent the leak.

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