Bluetooth ISO Socket Vulnerability in Linux Package: Critical Check for Null Pointer
Summary
DEBIAN-CVE-2024-42141: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Check socket flag instead of hcon This fixes the following Smatch static checker warning: net/bluetooth/iso.c:1364 iso_sock_recvmsg() er... Affects linux versions < 6.9.9-1. Fixed in 6.9.9-1. 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 to applications. It supports a wide range of functionalities, including networking, file systems, and device management. This vulnerability specifically affects the Bluetooth subsystem, where improper handling of socket connections can lead to potential crashes or undefined behavior.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the Bluetooth ISO socket handling code. The issue arises from the assumption that the 'hcon' pointer in the connection structure cannot be null. If 'hcon' is null, it can lead to dereferencing a null pointer, causing a crash or unexpected behavior in the Bluetooth stack. This vulnerability was highlighted by a Smatch static checker warning, indicating a flaw in the error handling logic of the iso_sock_recvmsg function.
How To Fix
Minimum fixed version
6.9.9-1
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. It is recommended to apply the patch as soon as it is available to mitigate any risks associated with this issue.
Conclusion
The Bluetooth ISO socket vulnerability in the Linux kernel poses a significant risk due to potential null pointer dereferences. Users are strongly advised to update to the patched version 6.9.9-1 to ensure system stability and security. Monitoring tools like Vulert can assist in identifying vulnerabilities in your software without requiring code access.
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FAQ
The vulnerability involves a null pointer dereference in the Bluetooth ISO socket handling code, which can lead to crashes.
The vulnerability affects all versions prior to the fixed version 6.9.9-1 in both Debian 13 and Debian 14.
You can use Vulert, which monitors open-source vulnerabilities in your software by analyzing the manifest file. Visit Vulert Scanner to check your application without any signup.
While there are no specific workarounds, it is advisable to monitor the situation and apply the patch as soon as possible to avoid potential risks.
Detailed information can be found in the Debian CVE database or through the official Linux kernel documentation.
References
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