Null Pointer Dereference Vulnerability in Linux Kernel - Package: linux
Summary
DEBIAN-CVE-2024-49918: In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null check for head_pipe in dcn32_acquire_idle_pipe_for_head_pipe_in_layer This commit addresses a potential null pointer dereferen... Affects linux versions < 6.11.4-1. Fixed in 6.11.4-1. How to fix ↓
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Background
The 'linux' package is a core component of the Debian operating system, providing the Linux kernel that manages system resources and hardware interactions. It is essential for the functioning of the operating system, enabling communication between software and hardware. This vulnerability pertains to a specific function within the kernel that could lead to system instability if not addressed.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the 'dcn32_acquire_idle_pipe_for_head_pipe_in_layer' function within the AMD display driver. This issue arises when the 'head_pipe' variable is null, potentially leading to a null pointer dereference. Such a dereference can cause system crashes or unexpected behavior, compromising system stability and security. The vulnerability was reported by smatch during code analysis, highlighting an assumption that 'head_pipe' would never be null, which has proven incorrect.
How To Fix
Minimum fixed version
6.11.4-1
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 provided for this vulnerability. The best course of action is to apply the patch by updating the package as mentioned above.
Conclusion
The identified null pointer dereference vulnerability in the Linux kernel's AMD display driver poses significant risks to system stability. It is crucial to update the 'linux' package to the latest version to mitigate these risks. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.
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FAQ
The vulnerability is a potential null pointer dereference in the Linux kernel's AMD display driver, which can lead to system crashes.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without any signup.
Failure to address this vulnerability may result in system instability, crashes, and potential security breaches.
Yes, updating to version 6.11.4-1 or later of the 'linux' package resolves the vulnerability.
It is advisable to regularly check for vulnerabilities and updates to ensure your system remains secure and stable.
References
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