Memory leaks in EVT_TRANSACTION handling in nfc: st21nfca

Kernel Updated 02 Oct 2025

Summary

28/06/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1002576: nfc: st21nfca: fix memory leaks in EVT_TRANSACTION handling. Affects Kernel versions >= 26fc6c7f02cb26c39c4733de3dbc3c0646fc1074, < 55904086041ba4ee4070187b36590f8f8d6df4cd. No fix is published. How to fix ↓

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Background

The nfc: st21nfca is a component of the Linux Kernel that provides support for Near Field Communication (NFC) functionality. NFC allows for short-range communication between devices, enabling features such as contactless payments and data transfer. The st21nfca driver is responsible for handling NFC transactions on devices that use the STMicroelectronics ST21NFCA NFC controller. This vulnerability specifically affects the EVT_TRANSACTION handling in the st21nfca driver.

Vulnerability Detail

The vulnerability in the EVT_TRANSACTION handling of nfc: st21nfca driver can lead to memory leaks. When processing certain NFC transactions, the driver fails to release allocated memory, resulting in memory leaks. An attacker could potentially exploit this vulnerability to exhaust system memory resources, leading to a denial of service condition. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

The vulnerability has been fixed in the Linux Kernel version v5.18.4 by commit 55904086041ba4ee4070187b36590f8f8d6df4cd. To fix the vulnerability, users are advised to update their Linux Kernel to version v5.18.4 or later. This can be done by obtaining the updated kernel source code 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 specific workaround mentioned for this vulnerability.

Conclusion

The memory leaks in the EVT_TRANSACTION handling of nfc: st21nfca driver have been addressed in the Linux Kernel version v5.18.4. Users are advised to update their kernel to this version or later to mitigate the vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.

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