Memory Leak Vulnerability in NFC Digital Component of Linux Kernel

Kernel Updated 02 Oct 2025

Summary

14/11/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001976: NFC: digital: fix possible memory leak in digital_tg_listen_mdaa(). Affects Kernel versions >= 1c7a4c24fbfd99442cc6e14dc80fcb00f118e8b8, < 9881b0c860649f27ef2565deef011e516390f416. No fix is published. How to fix ↓

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Background

The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for hardware interaction, process management, and system resource allocation. The NFC (Near Field Communication) subsystem within the Linux Kernel enables communication between devices in close proximity, facilitating tasks such as contactless payments and data transfer. The digital component of the NFC subsystem handles digital communication protocols and interfaces with NFC hardware. However, a vulnerability has been identified in the digital_tg_listen_mdaa() function of the digital component, which can lead to a memory leak.

Vulnerability Detail

The vulnerability in digital_tg_listen_mdaa() function of the NFC digital component can result in a memory leak. When this function is called, it may allocate memory dynamically but fail to deallocate it properly under certain conditions. This can lead to a gradual accumulation of unreleased memory, potentially causing resource exhaustion and system instability over time. An attacker may be able to exploit this vulnerability to exhaust system resources, resulting in a denial-of-service condition or other adverse effects. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.19.213 or later. This fix is available in commit 9881b0c860649f27ef2565deef011e516390f416. By applying the updated version of the Kernel, the memory leak issue in digital_tg_listen_mdaa() will be resolved.

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Workaround

No workaround has been provided for this vulnerability.

Conclusion

In conclusion, a memory leak vulnerability has been identified in the digital_tg_listen_mdaa() function of the NFC digital component in the Linux Kernel. This vulnerability can potentially lead to resource exhaustion and system instability. It is crucial to update the Linux Kernel to version v4.19.213 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.

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