Cache Coherency Vulnerability in Linux Kernel for Debian Packages
Summary
CVE-2023-53043: In the Linux kernel, the following vulnerability has been resolved: arm64: dts: qcom: sc7280: Mark PCIe controller as cache coherent If the controller is not marked as cache coherent, then kernel will try to ensure coher... Affects linux versions < 6.1.25-1. Fixed in 6.1.25-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to software applications. It is widely used across various distributions, including Debian. The kernel's functionality includes process management, memory management, device drivers, and system calls. The vulnerability in question affects the PCIe controller on the ARM64 architecture, specifically in the Qualcomm SC7280 platform, where the lack of proper cache coherency can lead to data corruption during DMA operations.
Vulnerability Detail
The vulnerability, identified as CVE-2023-53043, arises from the PCIe controller not being marked as cache coherent. This oversight can cause the Linux kernel to attempt to maintain coherency during direct memory access (DMA) operations, potentially resulting in data corruption. The issue is particularly critical for devices on the PCIe bus, which are expected to be cache coherent. If not addressed, this vulnerability could lead to system instability and data integrity issues.
How To Fix
Minimum fixed version
6.1.25-1
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 other than applying the patch. Users are encouraged to update to the fixed version as soon as it becomes available.
Conclusion
CVE-2023-53043 is a significant vulnerability in the Linux kernel affecting the PCIe controller on ARM64 architecture. It is crucial for users of Debian 12 and 13 to update their systems to the patched version 6.1.25-1 to avoid potential data corruption and system instability. Regular monitoring for vulnerabilities using tools like Vulert can help maintain system integrity.
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FAQ
CVE-2023-53043 is a vulnerability in the Linux kernel that affects the PCIe controller on the ARM64 architecture, leading to potential data corruption due to improper cache coherency.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. By using the Vulert playground, you can check if your application is affected by this vulnerability without any signup.
If left unaddressed, this vulnerability can lead to system instability and data integrity issues due to data corruption during DMA operations.
You can update your Linux kernel by running the command: sudo apt-get update && sudo apt-get install linux=6.1.25-1 on Debian 12 and 13 systems.
Currently, there are no specific workarounds available. The best course of action is to apply the patch by updating to the fixed version.
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