Memory Leak Vulnerability in Linux Kernel - CVE-2023-53396
Summary
CVE-2023-53396: In the Linux kernel, the following vulnerability has been resolved: ubifs: Fix memory leak in do_rename If renaming a file in an encrypted directory, function fscrypt_setup_filename allocates memory for a file name. Affects linux versions < 6.1.37-1. Fixed in 6.1.37-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, including various distributions of Debian. It manages hardware resources and provides essential services for software applications. The kernel is crucial for system stability and performance. This vulnerability affects the Linux package in Debian versions 12, 13, and 14, specifically in the UBIFS file system when handling encrypted directories.
Vulnerability Detail
CVE-2023-53396 is a memory leak vulnerability found in the Linux kernel's UBIFS file system. It occurs during the renaming of files in encrypted directories, where memory allocated for a filename is not freed before returning to the caller. This leads to memory leaks, which can degrade system performance over time. The vulnerability is triggered by the function fscrypt_setup_filename, which is called unnecessarily during the renaming process, resulting in unreferenced memory objects.
How To Fix
Minimum fixed version
6.1.37-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the patch as soon as it is available.
Conclusion
CVE-2023-53396 is a significant memory leak vulnerability in the Linux kernel that affects Debian systems. It is essential to update the Linux package to the patched versions to mitigate the risk of performance degradation due to memory leaks. Regular monitoring for vulnerabilities using tools like Vulert can help maintain system security.
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FAQ
CVE-2023-53396 is a memory leak vulnerability in the Linux kernel's UBIFS file system that occurs during file renaming in encrypted directories.
This vulnerability can lead to memory leaks, which may degrade system performance over time, especially if file renaming operations are frequent.
Debian versions 12, 13, and 14 are affected by this vulnerability.
You can protect your system by updating the Linux package to the patched versions as soon as they are available.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. You can check if your application is affected by this vulnerability using the Vulert playground without any signup.
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