Memory Leak Vulnerability in Linux Kernel: TX Metadata Options Issue
Summary
DEBIAN-CVE-2024-53236: In the Linux kernel, the following vulnerability has been resolved: xsk: Free skb when TX metadata options are invalid When a new skb is allocated for transmitting an xsk descriptor, i.e., for every non-multibuf descript... Affects linux versions < 6.12.3-1. Fixed in 6.12.3-1. How to fix ↓
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Background
The Linux kernel is a core component of the Debian operating system, responsible for managing hardware resources and providing essential services for software applications. It is known for its stability, performance, and security features. However, like any complex software, it can have vulnerabilities. This specific issue relates to the handling of transmit (TX) metadata options in the xsk (eXpress Data Path socket) subsystem, which can lead to resource leaks and impact system performance.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the xsk subsystem where a new socket buffer (skb) is allocated for transmitting an xsk descriptor. If the descriptor is found to have invalid TX metadata options, the allocated skb is not freed, leading to a memory leak. This leak can fill the send buffer, preventing the transmission of additional packets, which may degrade network performance and lead to denial of service conditions.
How To Fix
Minimum fixed version
6.12.3-1
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 workaround has been provided for this vulnerability. The best course of action is to apply the patch as soon as it becomes available.
Conclusion
The identified vulnerability in the Linux kernel's xsk subsystem poses a significant risk due to potential memory leaks affecting system performance. Updating to the patched version is essential to mitigate this issue. Users are encouraged to remain vigilant and utilize tools like Vulert for ongoing monitoring of vulnerabilities in their applications.
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FAQ
The vulnerability involves a memory leak in the Linux kernel's xsk subsystem due to improper handling of TX metadata options.
It can lead to resource exhaustion, preventing the transmission of new packets and potentially causing denial of service.
Yes, the vulnerability is fixed in version 6.12.3-1 of the Linux package for Debian 13 and 14.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
While there are no specific workarounds, it is crucial to monitor your system for unusual behavior and plan for an update as soon as possible.
References
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