Kernel Vulnerability in Linux Package: Race Condition in Eprobes Triggering
Summary
CVE-2022-49798: In the Linux kernel, the following vulnerability has been resolved: tracing: Fix race where eprobes can be called before the event The flag that tells the event to call its triggers after reading the event is set for epr... Affects linux versions < 6.0.10-1. Fixed in 6.0.10-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to software applications. It is widely used across various platforms, including servers, desktops, and embedded systems. This vulnerability affects the kernel's tracing functionality, specifically the eprobes mechanism, which allows developers to insert probes into the kernel for debugging and performance monitoring. The vulnerability arises from a race condition that can lead to a NULL pointer dereference, potentially causing system instability.
Vulnerability Detail
In the Linux kernel, a race condition exists where eprobes can be triggered before the event is fully initialized. This occurs because the flag that indicates the event should call its triggers is set after the eprobe is enabled. As a result, the eprobe may attempt to access record information that is NULL, leading to a NULL kernel pointer dereference. This vulnerability can cause system crashes, data corruption, and other unpredictable behaviors, posing a significant risk to system integrity and reliability.
How To Fix
Minimum fixed version
6.0.10-1
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. The best course of action is to apply the patch by updating to the fixed version of the Linux kernel.
Conclusion
CVE-2022-49798 is a critical vulnerability in the Linux kernel that arises from a race condition in the eprobes mechanism. It can lead to serious system instability due to NULL pointer dereferencing. Users are strongly advised to update their Linux kernel to the patched version 6.0.10-1 to ensure system security and reliability.
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FAQ
CVE-2022-49798 is a vulnerability in the Linux kernel that involves a race condition in the eprobes mechanism, potentially leading to a NULL pointer dereference.
This vulnerability can cause system crashes and instability, as it may lead to dereferencing a NULL pointer in the kernel, which can disrupt normal operations.
If you are using Debian 12 or Debian 13 with an affected version of the Linux kernel prior to 6.0.10-1, your system is at risk.
While there are no specific workarounds, it is crucial to plan for an update as soon as possible to mitigate the risk associated with this vulnerability.
You can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities using just a manifest file like package-lock.json. You can also check if your application is affected by this vulnerability using the Vulert playground.
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