Deadlock Issue in r8169 Driver - Linux Package Vulnerability
Summary
DEBIAN-CVE-2024-27021: In the Linux kernel, the following vulnerability has been resolved: r8169: fix LED-related deadlock on module removal Binding devm_led_classdev_register() to the netdev is problematic because on module removal we get a R... Affects linux versions < 6.8.9-1. Fixed in 6.8.9-1. How to fix ↓
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Background
The Linux package is a core component of the Debian operating system, providing the essential kernel that manages system resources and hardware interactions. It supports a wide range of functionalities, including process management, memory management, and device drivers. The r8169 driver is specifically responsible for managing Realtek Ethernet controllers, facilitating network connectivity. This vulnerability arises from a deadlock issue during module removal, which can impact system stability.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the r8169 driver related to LED management during module removal. The issue stems from binding the device-managed LED functions to the network device, leading to a Real-Time Networking Layer (RTNL) deadlock. This deadlock can prevent the proper removal of the module, potentially causing system hangs or crashes. The vulnerability has been assigned the identifier DEBIAN-CVE-2024-27021 and affects multiple Debian versions.
How To Fix
Minimum fixed version
6.8.9-1
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, there are no specific workarounds mentioned for this vulnerability. However, users are advised to avoid removing the r8169 module until the patch has been applied to prevent potential deadlocks.
Conclusion
The deadlock vulnerability in the r8169 driver of the Linux package poses a significant risk to system stability during module removal. It is crucial for users to update to the patched version 6.8.9-1 to mitigate this risk. Regular monitoring of vulnerabilities using tools like Vulert can help maintain system security.
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FAQ
The vulnerability is a deadlock issue in the r8169 driver during module removal, which can lead to system instability.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The vulnerability affects Debian versions 13 and 14 of the Linux package prior to version 6.8.9-1.
While the primary risk is system instability, it is advisable to back up important data to mitigate any potential issues.
If you cannot update the package, avoid removing the r8169 module to prevent triggering the deadlock.
References
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