NULL Pointer Dereference Vulnerability in Linux Kernel: ti-vpe Media Driver
Summary
CVE-2022-49254: In the Linux kernel, the following vulnerability has been resolved: media: ti-vpe: cal: Fix a NULL pointer dereference in cal_ctx_v4l2_init_formats() In cal_ctx_v4l2_init_formats(), devm_kzalloc() is assigned to ctx->act... Affects linux versions < 5.17.3-1. Fixed in 5.17.3-1. How to fix ↓
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Background
The Linux kernel is a core component of many operating systems, providing essential services for hardware and software interaction. The ti-vpe media driver is responsible for handling video processing within the kernel. This driver is crucial for managing video input and output, ensuring that multimedia applications can function effectively. However, it is susceptible to vulnerabilities that can compromise system stability and security.
Vulnerability Detail
In the Linux kernel, specifically within the ti-vpe media driver, a vulnerability was identified in the function cal_ctx_v4l2_init_formats(). The issue arises when the function devm_kzalloc() fails to allocate memory, resulting in a NULL pointer dereference when ctx->active_fmt is accessed subsequently. This flaw can lead to system crashes or unexpected behavior, posing a risk to the stability of applications relying on this driver. The vulnerability was detected by a static analyzer, highlighting the importance of rigorous code analysis in maintaining software integrity.
How To Fix
Minimum fixed version
5.17.3-1
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 by updating to the fixed version of the Linux kernel.
Conclusion
The CVE-2022-49254 vulnerability in the Linux kernel's ti-vpe media driver poses a significant risk due to a NULL pointer dereference issue. It is crucial to update to the patched version to mitigate potential system crashes and instability. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2022-49254 is a vulnerability in the Linux kernel's ti-vpe media driver that can lead to a NULL pointer dereference, potentially causing system crashes.
You can use Vulert, which monitors open-source vulnerabilities in your software. By using the manifest file like package-lock.json, you can check for vulnerabilities without needing to install any software.
The consequences include potential system crashes and instability in applications that rely on the ti-vpe media driver for video processing.
Yes, a patch is available. The vulnerability is fixed in version 5.17.3-1 of the Linux kernel.
You can use tools like Vulert to receive real-time alerts for open-source vulnerabilities in your software, ensuring you are always informed about potential risks.
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