Race Condition Vulnerability in Linux Kernel - CVE-2022-48759
Summary
DEBIAN-CVE-2022-48759: In the Linux kernel, the following vulnerability has been resolved: rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev struct rpmsg_ctrldev contains a struct cdev. Affects linux versions < 5.10.103-1. Fixed in 5.10.103-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential services such as process management, memory management, and device control. This vulnerability affects various Debian versions of the Linux kernel, specifically versions 5.10.103-1 and 5.16.7-1, which are critical for system stability and security.
Vulnerability Detail
In the Linux kernel, a race condition exists between the release of the rpmsg_ctrldev structure and its associated character device (cdev). The rpmsg_ctrldev structure is freed in the rpmsg_ctrldev_release_device() function, but since the cdev is a managed object, its release timing is unpredictable. This can lead to a situation where the rpmsg_ctrldev is freed before the cdev is fully released, potentially causing system instability and crashes. The vulnerability is identified as CVE-2022-48759.
How To Fix
Minimum fixed version
5.10.103-1
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 provided for this vulnerability. It is recommended to apply the patch as soon as possible to mitigate the risk.
Conclusion
CVE-2022-48759 is a significant vulnerability in the Linux kernel that requires immediate attention. Users are advised to update their systems to the latest patched versions to ensure stability and security. Regular monitoring for vulnerabilities using tools like Vulert can help maintain system integrity.
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FAQ
CVE-2022-48759 is a race condition vulnerability in the Linux kernel that can lead to system instability.
Debian versions 11, 12, 13, and 14 are affected by this vulnerability.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Check your application against this vulnerability using the Vulert playground without signup.
While there are no specific workarounds, it is crucial to plan for an update as soon as possible to mitigate risks.
Exploitation of this vulnerability may lead to system crashes and instability, impacting the overall performance of the operating system.
References
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