CVE-2026-45926
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Memory Leak in Linux Kernel PWM 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: rust: pwm: Fix potential memory leak on init error When initializing a PWM chip using pwmchip_alloc(), the allocated device owns an initial reference that must be released on all error paths. If __pinned_init() were to fail, the allocated pwm_chip would currently leak because the error path returns without calling pwmchip_put().
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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-2026-45926
EUVD
EUVD-2026-32392
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
rust pwm *
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Exploitability
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's Rust PWM (Pulse Width Modulation) driver. Specifically, when initializing a PWM chip using the function pwmchip_alloc(), the allocated device holds an initial reference that must be properly released if an error occurs during initialization.

If the function __pinned_init() fails during initialization, the allocated pwm_chip object is not properly released because the error path does not call pwmchip_put(). This results in a potential memory leak where allocated resources are not freed.

Impact Analysis

The primary impact of this vulnerability is a potential memory leak in the Linux kernel when initializing PWM chips. Over time, repeated failures in initialization could cause increased memory consumption, potentially leading to degraded system performance or instability.

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