Memory Leak Vulnerability in Linux Kernel: CVE-2023-53409
Summary
CVE-2023-53409: In the Linux kernel, the following vulnerability has been resolved: drivers: base: component: fix memory leak with using debugfs_lookup() When calling debugfs_lookup() the result must have dput() called on it, otherwise... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, responsible for managing hardware resources and providing essential services for software applications. It is known for its stability, performance, and security features. However, vulnerabilities can arise from various components, including drivers and subsystems. CVE-2023-53409 specifically addresses a memory leak issue related to the debugfs_lookup() function, which can lead to resource exhaustion over time.
Vulnerability Detail
CVE-2023-53409 is a vulnerability in the Linux kernel that occurs when the debugfs_lookup() function is called without subsequently calling dput() on the result. This oversight can lead to a memory leak, as the allocated memory is not properly released, potentially causing the system to exhaust available memory resources over time. The vulnerability affects multiple Debian versions of the Linux kernel, making it critical for users to address it promptly.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can replace calls to debugfs_lookup() with debugfs_lookup_and_remove(), which automatically handles the necessary memory management, preventing the memory leak.
Conclusion
CVE-2023-53409 is a significant vulnerability in the Linux kernel that can lead to memory leaks if not addressed. Users are encouraged to update their systems to the patched version to ensure stability and security. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2023-53409 is a memory leak vulnerability in the Linux kernel related to the improper handling of memory in the debugfs_lookup() function.
If left unaddressed, this vulnerability can lead to memory exhaustion, potentially causing system instability or crashes.
The vulnerability affects Debian versions 11, 12, 13, and 14 of the Linux kernel.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
As a temporary measure, consider using the workaround by replacing debugfs_lookup() with debugfs_lookup_and_remove() to mitigate the risk of memory leaks.
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