Linux Kernel Vulnerability CVE-2024-40999: Inconsistent Completion Descriptors in ENA Driver
Summary
CVE-2024-40999: In the Linux kernel, the following vulnerability has been resolved: net: ena: Add validation for completion descriptors consistency Validate that first flag is set only for the first descriptor in multi-buffer packets. 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 a core component of many operating systems, providing essential services for hardware and software interaction. It is known for its stability, security, and flexibility, making it a popular choice for servers, desktops, and embedded systems. The kernel supports various drivers, including the Elastic Network Adapter (ENA), which is designed for high-performance networking. However, vulnerabilities can arise in these drivers, potentially leading to data corruption and system instability.
Vulnerability Detail
CVE-2024-40999 is a vulnerability in the Linux kernel's ENA driver that involves the validation of completion descriptors. Specifically, the vulnerability arises when the 'first' flag is incorrectly set for descriptors in multi-buffer packets. This inconsistency can lead to a reset of the system in the event of an invalid descriptor, resulting in potential data corruption during RX operations. The addition of a new reset reason for RX data corruption highlights the severity of this issue, as it can disrupt network operations and compromise system integrity.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds provided for this vulnerability. The best course of action is to apply the necessary updates as soon as they are available.
Conclusion
CVE-2024-40999 is a significant vulnerability in the Linux kernel's ENA driver that can lead to data corruption and system resets. Users are strongly advised to update their systems to the latest kernel version to mitigate this risk. Regular monitoring of vulnerabilities using tools like Vulert can help maintain system security.
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FAQ
CVE-2024-40999 is a vulnerability in the Linux kernel's ENA driver that can lead to data corruption due to inconsistent completion descriptors.
This vulnerability can cause system resets and data corruption during network operations, potentially disrupting services and affecting data integrity.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Check your application against CVE-2024-40999 using the Vulert playground at Vulert Scanner.
While there are no specific workarounds, it is crucial to plan for an update as soon as possible to mitigate the risk of exploitation.
Detailed information can be found in the official CVE database and related security advisories, such as USN-6999-1.
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