Critical NULL Pointer Dereference in Linux Kernel: linux Package Vulnerability
Summary
DEBIAN-CVE-2023-52647: In the Linux kernel, the following vulnerability has been resolved: media: nxp: imx8-isi: Check whether crossbar pad is non-NULL before access When translating source to sink streams in the crossbar subdev, the driver tr... Affects linux versions < 6.7.12-1. Fixed in 6.7.12-1. How to fix ↓
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Background
The linux package is a core component of the Debian operating system, providing the essential kernel that manages system resources and hardware interactions. It is responsible for enabling the execution of applications, managing memory, and facilitating communication between software and hardware. This vulnerability affects the media subsystem of the Linux kernel, specifically within the NXP IMX8 Image Signal Interface (ISI) driver, which is responsible for handling image data streams.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the media subsystem where the driver fails to check if a crossbar pad is non-NULL before accessing it. This issue arises when userspace attempts to enable a stream that ends at an unconnected crossbar sink, leading to a NULL pointer dereference. The consequence of this oversight is a potential crash of the kernel, which can disrupt system operations and lead to denial of service. The vulnerability has been cataloged as DEBIAN-CVE-2023-52647.
How To Fix
Minimum fixed version
6.7.12-1
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. However, avoiding the use of the affected driver configurations may help mitigate the risk until the system can be updated.
Conclusion
The vulnerability identified as DEBIAN-CVE-2023-52647 poses a significant risk to systems running the affected linux package due to a NULL pointer dereference issue. It is crucial for users to update their systems to the patched version to mitigate this risk and maintain system stability.
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FAQ
DEBIAN-CVE-2023-52647 is a vulnerability in the Linux kernel that can cause a system crash due to a NULL pointer dereference in the media subsystem.
You can use Vulert, which monitors open-source vulnerabilities in your software. By simply uploading your manifest file like package-lock.json, you can check for vulnerabilities without needing to install any software.
The primary impact of this vulnerability is a potential crash of the Linux kernel, leading to a denial of service and disruption of system operations.
Yes, a patch is available in the form of an updated linux package version 6.7.12-1, which addresses the vulnerability.
You can use Vulert's playground to monitor and receive alerts for open-source vulnerabilities in real-time, ensuring your applications remain secure.
References
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