Kernel NULL Pointer Dereference in Linux Package: CVE-2024-50298
Summary
DEBIAN-CVE-2024-50298: In the Linux kernel, the following vulnerability has been resolved: net: enetc: allocate vf_state during PF probes In the previous implementation, vf_state is allocated memory only when VF is enabled. Affects linux versions < 6.11.9-1. Fixed in 6.11.9-1. 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 applications. It supports a wide range of functionalities, including process management, memory management, and device control. The vulnerability identified as CVE-2024-50298 affects the Linux package in Debian versions 13 and 14, specifically related to the enetc driver, which handles Ethernet networking for virtual functions (VFs).
Vulnerability Detail
In the Linux kernel, a vulnerability has been discovered in the enetc driver where memory allocation for vf_state occurs only when a virtual function (VF) is enabled. This can lead to a NULL pointer dereference if the net_device_ops::ndo_set_vf_mac() function is called before the VF is enabled. Consequently, accessing vf_state results in a crash, causing system instability and potential denial of service. The error log indicates that the system is unable to handle a kernel NULL pointer dereference, which can disrupt network operations.
How To Fix
Minimum fixed version
6.11.9-1
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 the risk.
Conclusion
CVE-2024-50298 is a critical vulnerability in the Linux kernel affecting Debian systems, specifically related to the enetc driver. It is essential to update to the patched version to prevent potential system crashes and ensure network stability. Regular monitoring and prompt updates are key to maintaining system security.
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FAQ
CVE-2024-50298 is a vulnerability in the Linux kernel that can lead to a NULL pointer dereference in the enetc driver, potentially causing system crashes.
Debian versions 13 and 14 are affected by this vulnerability.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without needing to sign up.
While there are no specific workarounds available, it is crucial to plan for an update as soon as possible to mitigate the risk associated with this vulnerability.
The vulnerability can lead to system instability and denial of service, affecting network operations and overall system performance.
References
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