Kernel Panic Vulnerability in Linux Package - CVE-2022-50398
Summary
CVE-2022-50398: In the Linux kernel, the following vulnerability has been resolved: drm/msm/dp: add atomic_check to bridge ops DRM commit_tails() will disable downstream crtc/encoder/bridge if both disable crtc is required and crtc->act... Affects linux versions < 6.0.7-1. Fixed in 6.0.7-1. How to fix ↓
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Background
The Linux kernel is a critical component of the operating system, responsible for managing hardware resources and providing essential services to applications. It supports a wide range of functionalities, including process management, memory management, and device control. This vulnerability affects the Linux package in Debian versions 12, 13, and 14, specifically related to the Direct Rendering Manager (DRM) subsystem, which handles graphics rendering.
Vulnerability Detail
CVE-2022-50398 is a vulnerability in the Linux kernel that can lead to a kernel panic due to improper handling of display updates when the display interface is disabled. The issue arises when a user space display manager issues an extra screen update immediately before closing the DRM device, causing the kernel to attempt to access disabled hardware resources. This can result in a crash, as the kernel tries to push an idle pattern out while the main link clocks are disabled, leading to a system halt.
How To Fix
Minimum fixed version
6.0.7-1
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
As a temporary workaround, users can avoid issuing screen updates while the display interface is disabled. This can be managed by ensuring that the display manager does not attempt to refresh the screen during critical operations that involve closing the DRM device.
Conclusion
CVE-2022-50398 represents a significant vulnerability in the Linux kernel that can lead to system crashes under specific conditions. It is crucial for users 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-2022-50398 is a vulnerability in the Linux kernel that can cause a kernel panic due to improper handling of display updates.
Debian versions 12, 13, and 14 are affected by this vulnerability.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
The vulnerability can lead to a kernel panic, causing the system to crash and potentially resulting in data loss or system instability.
Yes, a patch is available in version 6.0.7-1 of the Linux package. Users should update to this version to mitigate the vulnerability.
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