Race Condition Vulnerability in i40e Driver of Linux Kernel
Summary
CVE-2024-53088: In the Linux kernel, the following vulnerability has been resolved: i40e: fix race condition by adding filter's intermediate sync state Fix a race condition in the i40e driver that leads to MAC/VLAN filters becoming corr... 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 i40e driver is responsible for managing Intel Ethernet devices, enabling efficient network communication. This driver is critical for systems that require high-performance networking, particularly in virtualized environments. However, it is susceptible to a race condition vulnerability that can lead to MAC/VLAN filter corruption under heavy load.
Vulnerability Detail
The vulnerability arises from a race condition in the i40e driver, specifically when multiple threads attempt to modify MAC and VLAN filters simultaneously. This can lead to corrupted filters and memory leaks, resulting in network errors. The issue is triggered when one thread allocates a filter while another concurrently frees it, causing subsequent operations to reference already freed memory. This vulnerability can severely impact network performance and reliability, especially in environments with high traffic and multiple virtual functions (VFs).
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can reduce the load on the i40e driver by limiting the number of concurrent operations that modify MAC and VLAN filters. Additionally, enabling promiscuous mode on the affected virtual functions may help mitigate the errors until a patch is applied.
Conclusion
The race condition vulnerability in the i40e driver of the Linux kernel poses significant risks to network performance and reliability. It is crucial for users to update their systems to the latest kernel version to mitigate these risks. In the meantime, applying workarounds can help reduce the impact of this vulnerability.
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FAQ
A race condition occurs when two or more threads access shared data and try to change it at the same time. If the operations are not synchronized properly, it can lead to unexpected behavior and data corruption.
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Symptoms include network errors such as 'Error I40E_AQ_RC_ENOSPC adding RX filters on VF XX' in the system logs, indicating issues with MAC/VLAN filter management.
Yes, the permanent fix is to update the Linux kernel to a version that includes the patch for the i40e driver. Regularly check for updates to ensure your system is secure.
If an immediate update is not possible, implement the suggested workarounds to minimize the risk of encountering the vulnerability until you can apply the patch.
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