CVE-2023-53997
Unknown Unknown - Not Provided

Double-Free Vulnerability in Linux Kernel Thermal Zone Registration

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: thermal: of: fix double-free on unregistration Since commit 3d439b1a2ad3 ("thermal/core: Alloc-copy-free the thermal zone parameters structure"), thermal_zone_device_register() allocates a copy of the tzp argument and frees it when unregistering, so thermal_of_zone_register() now ends up leaking its original tzp and double-freeing the tzp copy. Fix this by locating tzp on stack instead.

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Meta Information

Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-07-06
AI Q&A
2025-12-24
EPSS Evaluated
2026-07-05
NVD
CVE-2023-53997
EUVD
EUVD-2025-205150

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 is a double-free issue in the Linux kernel's thermal subsystem. Specifically, after a certain commit, the function thermal_zone_device_register() allocates and frees a copy of the thermal zone parameters (tzp) argument, but thermal_of_zone_register() ends up leaking the original tzp and double-freeing the copied tzp. The fix involves placing tzp on the stack to avoid this double-free and memory leak.

Impact Analysis

This double-free vulnerability can lead to memory corruption, which may cause system instability, crashes, or potentially allow an attacker to execute arbitrary code or escalate privileges on the affected Linux system.

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