Kernel Panic Vulnerability in Linux Package: CVE-2024-46823
Summary
CVE-2024-46823: In the Linux kernel, the following vulnerability has been resolved: kunit/overflow: Fix UB in overflow_allocation_test The 'device_name' array doesn't exist out of the 'overflow_allocation_test' function scope. 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 a core component of the Linux operating system, responsible for managing hardware resources and providing essential services to software applications. It is widely used in various distributions, including Debian. The kernel's stability and security are paramount, as vulnerabilities can lead to system crashes, data loss, or unauthorized access. This specific vulnerability, CVE-2024-46823, affects the kernel's handling of driver names, potentially causing kernel panics when certain conditions are met.
Vulnerability Detail
CVE-2024-46823 is a vulnerability in the Linux kernel related to the 'overflow_allocation_test' function. The issue arises from the improper use of the 'device_name' array, which is defined within the function's scope but is incorrectly referenced outside of it when calling 'kunit_driver_create' from 'kunit_device_register'. This misuse can lead to undefined behavior and kernel panic, especially when Kernel Address Sanitizer (KASAN) is enabled. The vulnerability poses a risk of system instability and crashes, which can disrupt services and affect user experience.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the fix as described above. However, users can temporarily disable KASAN if they are experiencing kernel panics related to this issue, although this is not a recommended long-term solution.
Conclusion
CVE-2024-46823 represents a significant vulnerability in the Linux kernel that can lead to kernel panics and system instability. It is crucial for users and developers to understand the implications of this vulnerability and take the necessary steps to apply the fix. Regular monitoring for vulnerabilities using tools like Vulert can help maintain system security and stability.
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FAQ
CVE-2024-46823 is a vulnerability in the Linux kernel that can cause kernel panic due to improper handling of driver names.
This vulnerability can lead to system crashes and instability, particularly when KASAN is enabled, disrupting services and user experience.
You should apply the fix by modifying the kernel code as described and recompiling the kernel to eliminate the vulnerability.
There are no specific workarounds available. It is recommended to apply the fix directly to the kernel code.
You can use Vulert, which monitors open-source vulnerabilities in your software. By using the Vulert playground, you can check if your application is affected without any signup.
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