Memory Leak in net: caif: ldisc_open
Summary
UVI-2021-1001133: net: caif: fix memory leak in ldisc_open. Affects Kernel versions < e056cc440ae71fda770814a7aa865279fc8d6462. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The net package in the Linux Kernel is responsible for managing network protocols and communication. It includes various modules and drivers for different network interfaces. One of these modules is caif, which stands for Common API for Interfacing with the Fabric. The caif module provides a framework for communication between different network layers. However, a vulnerability has been discovered in the ldisc_open function of the caif module, which can lead to a memory leak.
Vulnerability Detail
The vulnerability in the ldisc_open function of the caif module can result in a memory leak. When a user opens a line discipline (ldisc) device, the function allocates memory for the ldisc structure. However, if an error occurs during the allocation process, the function fails to release the allocated memory, leading to a memory leak. This can eventually exhaust the available memory resources, causing system instability or denial of service. The vulnerability has been fixed in Linux Kernel version v5.12.14 by commit e056cc440ae71fda770814a7aa865279fc8d6462.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the net: caif module in the Linux Kernel is vulnerable to a memory leak in the ldisc_open function. This vulnerability can lead to system instability or denial of service. It is recommended to update the Linux Kernel to version v5.12.14 or later to fix the vulnerability. If you need further assistance or support in addressing this vulnerability, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The vulnerability can result in a memory leak, which can lead to system instability or denial of service if the available memory resources are exhausted.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and Vulert will analyze it for any open-source vulnerabilities, including this one.
There is no known exploit for this vulnerability at the moment. However, it is always recommended to apply security patches and updates to mitigate the risk of potential exploits.
The recommended approach is to update the Linux Kernel to the fixed version. However, if updating is not feasible, you can try analyzing the source code of the ldisc_open function and manually applying the necessary changes to fix the memory leak. This requires a deep understanding of the Linux Kernel codebase and is not recommended for inexperienced users.
You can find more information about this vulnerability in the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) by searching for the commit e056cc440ae71fda770814a7aa865279fc8d6462.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
