Critical Vulnerability in Linux Kernel: hibmc Driver NULL Pointer Dereference
Summary
CVE-2025-39772: In the Linux kernel, the following vulnerability has been resolved: drm/hisilicon/hibmc: fix the hibmc loaded failed bug When hibmc loaded failed, the driver use hibmc_unload to free the resource, but the mutexes in mode... 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 the core component of many operating systems, responsible for managing hardware and system resources. It provides essential services for all other parts of the operating system. The kernel is modular, allowing for the addition of drivers, such as the hibmc driver, which is used for handling specific hardware functionalities. This vulnerability affects multiple Debian versions, highlighting the importance of maintaining up-to-date kernel packages to ensure system stability and security.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the hibmc driver related to the handling of resource deallocation. When the hibmc driver fails to load, it attempts to free resources using the hibmc_unload function. However, the mutexes in mode.config are not initialized, leading to a NULL pointer dereference. This can result in system instability or crashes, making it critical to address this issue promptly.
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. Users are advised to apply the patch as soon as it becomes available to mitigate risks associated with the NULL pointer dereference.
Conclusion
The CVE-2025-39772 vulnerability in the Linux kernel's hibmc driver poses a significant risk due to its potential to cause system crashes. Users are urged to update their kernel packages promptly to mitigate this risk. Utilizing tools like Vulert can help in monitoring for such vulnerabilities effectively.
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FAQ
CVE-2025-39772 is a vulnerability in the Linux kernel's hibmc driver that can lead to a NULL pointer dereference, potentially causing system crashes.
The vulnerability affects Debian versions 11, 12, 13, and 14, all utilizing the Linux kernel.
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 needing to sign up.
While there are no specific workarounds, it is advisable to monitor your system closely for any unusual behavior until the patch is applied.
It is recommended to check for updates regularly, ideally weekly, to ensure that your system is protected against known vulnerabilities.
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