Critical Vulnerability in Linux Kernel: CVE-2023-53362 - Device Binding Crash Risk
Summary
CVE-2023-53362: In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: don't assume child devices are all fsl-mc devices Changes in VFIO caused a pseudo-device to be created as child of fsl-mc devices causing a... Affects linux versions < 6.1.52-1. Fixed in 6.1.52-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interaction. It is responsible for managing system resources and facilitating communication between hardware and applications. This vulnerability affects the Linux kernel versions in Debian 12, 13, and 14, specifically related to the handling of fsl-mc devices, which are used in various hardware platforms.
Vulnerability Detail
CVE-2023-53362 is a vulnerability in the Linux kernel that arises from an incorrect assumption about child devices of fsl-mc devices. The issue occurs when a pseudo-device is created as a child of fsl-mc devices, leading to a crash when attempting to bind a fsl-mc device to VFIO (Virtual Function I/O). This can result in system instability and potential denial of service, as the kernel may encounter an internal error during device enumeration.
How To Fix
Minimum fixed version
6.1.52-1
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. It is advisable to apply the patch as soon as it is available to mitigate the risk.
Conclusion
CVE-2023-53362 represents a significant risk to systems running affected versions of the Linux kernel, particularly in Debian distributions. Users are urged to update their kernels to the patched versions to ensure system stability and security.
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FAQ
CVE-2023-53362 is a vulnerability in the Linux kernel that can cause system crashes when binding certain devices.
The vulnerability affects Linux kernel versions in Debian 12, 13, and 14.
You can use tools like Vulert to monitor and alert for open-source vulnerabilities in your software without needing to access the code.
While there are no specific workarounds, it is crucial to plan for an update as soon as possible to avoid potential crashes.
Detailed information can be found in the CVE database and through security advisories related to the Linux kernel.
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