Critical Data Synchronization Vulnerability in Linux Kernel - CVE-2024-40986
Summary
DEBIAN-CVE-2024-40986: In the Linux kernel, the following vulnerability has been resolved: dmaengine: xilinx: xdma: Fix data synchronisation in xdma_channel_isr() Requests the vchan lock before using xdma->stop_request. Affects linux versions < 6.9.7-1. Fixed in 6.9.7-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware management and system operations. It is widely used in various distributions, including Debian. The kernel is responsible for managing system resources and facilitating communication between hardware and software. The vulnerability identified as CVE-2024-40986 affects the dmaengine subsystem, specifically within the xilinx xdma driver, which is responsible for handling direct memory access (DMA) operations. This vulnerability could potentially lead to data inconsistency and system instability if exploited.
Vulnerability Detail
CVE-2024-40986 is a vulnerability in the Linux kernel's dmaengine subsystem, specifically in the xilinx xdma driver. The issue arises from improper data synchronization in the xdma_channel_isr() function, where the vchan lock is not acquired before accessing the xdma->stop_request. This oversight can lead to race conditions, allowing an attacker to manipulate DMA operations, potentially resulting in data corruption or system crashes. The vulnerability was introduced in earlier versions of the kernel and has been fixed in version 6.9.7-1.
How To Fix
Minimum fixed version
6.9.7-1
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
Currently, no specific workarounds are provided for this vulnerability. The best course of action is to apply the patch as soon as it is available.
Conclusion
CVE-2024-40986 is a critical vulnerability in the Linux kernel that affects the dmaengine subsystem. Users are strongly advised to update their systems to the patched version to mitigate potential risks associated with this vulnerability. Regular monitoring and updates are essential to maintain system security.
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FAQ
CVE-2024-40986 is a vulnerability in the Linux kernel's dmaengine subsystem that can lead to data synchronization issues.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
Exploitation of this vulnerability could lead to data corruption, system instability, or crashes due to improper handling of DMA operations.
You can update your Linux kernel by running the command: sudo apt-get update && sudo apt-get install linux in your terminal.
Currently, there are no specific workarounds available. The recommended action is to update to the patched version.
References
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