Critical Vulnerability in Linux Package: Improper Reset of Rx Ring Descriptor
Summary
DEBIAN-CVE-2025-38532: In the Linux kernel, the following vulnerability has been resolved: net: libwx: properly reset Rx ring descriptor When device reset is triggered by feature changes such as toggling Rx VLAN offload, wx->do_reset() is call... Affects linux versions < 6.12.41-1. Fixed in 6.12.41-1. How to fix ↓
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Background
The Linux package is a core component of the Debian operating system, providing essential functionalities for managing hardware and system resources. It is widely used in various environments, from servers to personal computers. This package is known for its stability and performance, but like any software, it can be susceptible to vulnerabilities that may compromise system integrity and security.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified related to the improper resetting of the Rx ring descriptor during device resets triggered by feature changes, such as toggling Rx VLAN offload. This flaw can lead to the retention of stale values in the hardware descriptor ring, resulting in the creation of malformed SKBs (Socket Buffers). The vulnerability can cause kernel crashes and system instability, as evidenced by the kernel BUG and invalid opcode errors reported in the logs.
How To Fix
Minimum fixed version
6.12.41-1
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
As a temporary workaround, users may consider disabling the affected features that trigger the device reset until the package can be updated. However, this is not a permanent solution and should be followed by an update as soon as possible.
Conclusion
The identified vulnerability in the Linux package poses significant risks to system stability and security. It is crucial for users to update to the patched versions as soon as possible to mitigate these risks. Utilizing tools like Vulert can help monitor for such vulnerabilities in real-time, ensuring that systems remain secure.
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FAQ
The vulnerability involves improper resetting of the Rx ring descriptor, which can lead to kernel crashes and system instability.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without requiring signup.
Failure to address this vulnerability may result in system crashes, data loss, and potential exploitation by malicious actors.
Yes, the vulnerability is fixed in Linux version 6.12.41-1 for Debian 13 and 6.16.3-1 for Debian 14.
If immediate updating is not possible, consider disabling the features that trigger the device reset as a temporary workaround.
References
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