Critical Bluetooth Vulnerability in Linux Kernel: CVE-2024-56591
Summary
CVE-2024-56591: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Use disable_delayed_work_sync This makes use of disable_delayed_work_sync instead cancel_delayed_work_sync as it not only cancel th... 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 the essential interface between hardware and software. It is known for its stability, performance, and support for a wide range of hardware architectures. The kernel manages system resources and facilitates communication between hardware and software applications. However, like any complex software, it is susceptible to vulnerabilities that can compromise system security and functionality. CVE-2024-56591 specifically affects the Bluetooth subsystem, which is responsible for managing wireless communication between devices.
Vulnerability Detail
CVE-2024-56591 is a vulnerability in the Linux kernel's Bluetooth subsystem, specifically in the handling of connection management. The issue arises from the improper use of the cancel_delayed_work_sync function, which can lead to potential race conditions when freeing objects that hold work. This can result in undefined behavior or system crashes, posing a significant risk to system stability and security. The vulnerability has been addressed by replacing cancel_delayed_work_sync with disable_delayed_work_sync, which not only cancels ongoing work but also prevents new submissions, ensuring that the object holding the work is safely managed before being freed.
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 patch as soon as it becomes available.
Conclusion
CVE-2024-56591 is a critical vulnerability in the Linux kernel's Bluetooth subsystem that can lead to significant system instability and security risks. Users are advised to update their systems to the patched version as soon as possible to protect against potential exploits. Regular monitoring and timely updates are essential for maintaining system security.
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FAQ
CVE-2024-56591 is a vulnerability in the Linux kernel's Bluetooth subsystem that can lead to system instability and security risks.
This vulnerability can cause undefined behavior or crashes in systems using the affected Bluetooth functionality, potentially leading to data loss or system downtime.
Versions of the Linux kernel prior to the patched version 6.12.5-1 for Debian 13 are affected. Users of Debian 11 and 12 should check for updates.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without requiring any installation.
While there are no specific workarounds, it is crucial to prioritize updating your kernel to mitigate the risks associated with this vulnerability.
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