Memory Leak Vulnerability in Linux Kernel's VFIO PCI Module
Summary
CVE-2024-38632: In the Linux kernel, the following vulnerability has been resolved: vfio/pci: fix potential memory leak in vfio_intx_enable() If vfio_irq_ctx_alloc() failed will lead to 'name' memory leak. Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. 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. The VFIO (Virtual Function I/O) PCI module allows users to assign PCI devices to virtual machines, enabling efficient resource management and isolation. However, this module is susceptible to vulnerabilities that can lead to memory leaks, affecting system performance and stability.
Vulnerability Detail
The vulnerability identified as CVE-2024-38632 arises from a potential memory leak in the vfio_intx_enable() function within the VFIO PCI module of the Linux kernel. Specifically, if the vfio_irq_ctx_alloc() function fails, it can result in a memory leak of the 'name' variable. This issue can lead to increased memory consumption over time, potentially degrading system performance and causing instability, especially in environments with heavy virtualization workloads.
How To Fix
No fixed version is published for this vulnerability.
To rectify this vulnerability, users should update their Linux kernel to the latest version that includes the fix for CVE-2024-38632. The specific version that addresses this issue for Debian 13 is 6.9.7-1. Users can perform the update by executing the following commands in their terminal:
sudo apt update
sudo apt upgrade linux
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best approach is to apply the necessary updates as soon as they are available.
Conclusion
CVE-2024-38632 is a significant vulnerability in the Linux kernel's VFIO PCI module that can lead to memory leaks and system instability. Users are advised to update their systems promptly to mitigate the risks associated with this vulnerability. Utilizing tools like Vulert can help in monitoring and managing open-source vulnerabilities effectively.
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FAQ
CVE-2024-38632 is a vulnerability in the Linux kernel's VFIO PCI module that can lead to a memory leak if certain conditions are met.
If exploited, this vulnerability can cause increased memory usage, potentially leading to system slowdowns or crashes, particularly in virtualized environments.
You should update your Linux kernel to the latest version that includes the fix for this vulnerability.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software by analyzing your manifest file. You can check if your application is affected by this vulnerability using the Vulert playground.
The CVSS score for CVE-2024-38632 is 5.5, indicating a moderate level of severity.
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