Memory Leak Vulnerability in NFC Digital Module of Linux Kernel
Summary
GSD-2021-1001807: NFC: digital: fix possible memory leak in digital_in_send_sdd_req(). Affects Kernel versions >= 2c66daecc4092e6049673c281b2e6f0d5e59a94c, < 071bdef36391958c89af5fa2172f691b31baa212. 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 and interfaces for hardware devices, including NFC (Near Field Communication) modules. NFC digital module enables communication between devices in close proximity, facilitating contactless data transfer and payment systems. However, a vulnerability has been identified in the digital_in_send_sdd_req() function of the NFC digital module, which could lead to a memory leak.
Vulnerability Detail
The vulnerability in the digital_in_send_sdd_req() function of the NFC digital module allows for a possible memory leak. When this function is called, there is a potential scenario where memory resources are not properly released, resulting in a memory leak. Although the impact and attack plausibility have not been proven, a memory leak can lead to performance degradation and resource exhaustion over time. This vulnerability was introduced in Linux Kernel version v3.13 and has been fixed in version v4.19.213 by commit 071bdef36391958c89af5fa2172f691b31baa212.
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 can be done by pulling the latest updates from the official Linux Kernel repository. Alternatively, users can apply the specific commit 071bdef36391958c89af5fa2172f691b31baa212 to their existing kernel version. It is crucial to ensure that the NFC digital module is using the patched version to prevent memory leaks.
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Workaround
There is no specific workaround mentioned for this vulnerability. The recommended approach is to apply the fix by updating the Linux Kernel to the patched version.
Conclusion
In conclusion, a memory leak vulnerability has been identified in the NFC digital module of the Linux Kernel. This vulnerability can potentially lead to performance degradation and resource exhaustion over time. It is crucial to update the Linux Kernel to version v4.19.213 or later, or apply the specific commit 071bdef36391958c89af5fa2172f691b31baa212, to mitigate the risk of memory leaks. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability is a possible memory leak in the NFC digital module of the Linux Kernel. While the exact consequences may vary, a memory leak can lead to performance degradation and resource exhaustion over time.
You can use Vulert's playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities.
As of now, there is no known exploit for this vulnerability. However, it is essential to apply the fix to prevent potential memory leaks and mitigate any future risks.
Yes, you can manually patch the vulnerability by applying the specific commit 071bdef36391958c89af5fa2172f691b31baa212 to your existing Linux Kernel version. However, it is recommended to update the entire kernel to the latest patched version for comprehensive security.
This vulnerability specifically affects the NFC digital module in the Linux Kernel. It is advisable to update the kernel to the patched version rather than relying on alternative modules, as they may also have their own vulnerabilities.
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