Memory Leak in NFC: st21nfca

Kernel Updated 02 Oct 2025

Summary

10/01/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000050: NFC: st21nfca: Fix memory leak in device probe and remove. Affects Kernel versions >= 68957303f44a501af5cf37913208a2acaa6bcdf1, < 238920381b8925d070d32d73cd9ce52ab29896fe. No fix is published. How to fix ↓

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Background

The NFC (Near Field Communication) package, st21nfca, is a component of the Linux Kernel. It provides support for NFC devices based on the STMicroelectronics ST21NFC chipset. NFC technology enables short-range communication between devices, allowing for contactless data transfer and payment transactions. The st21nfca package is vulnerable to a memory leak issue.

Vulnerability Detail

The memory leak vulnerability in the st21nfca package occurs during device probe and removal. When a device is probed or removed, memory resources are not properly released, leading to a gradual depletion of available memory. This can result in system instability, performance degradation, and potential denial-of-service attacks. The vulnerability was introduced in Linux Kernel version v3.16 and has been fixed in version v5.15.13.

How To Fix

No fixed version is published for this vulnerability.

To fix the memory leak vulnerability in the st21nfca package, it is recommended to update the Linux Kernel to version v5.15.13 or later. This can be done by fetching the latest kernel source code from the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and compiling it for the target system. Alternatively, users can wait for their Linux distribution to provide an updated kernel package.

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Workaround

There is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel to the recommended version.

Conclusion

The st21nfca package in the Linux Kernel is vulnerable to a memory leak issue. To mitigate this vulnerability, it is crucial to update the Linux Kernel to version v5.15.13 or later. For further support and assistance in vulnerability remediation, please contact DevNack.com.

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