NULL Pointer Dereference in Linux Kernel (CVE-2019-16231)
Summary
CVE-2019-16231: drivers/net/fjes/fjes_main.c in the Linux kernel 5.2.14 does not check the alloc_workqueue return value, leading to a NULL pointer dereference. 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 widely used open-source operating system kernel that serves as the foundation for numerous Linux distributions. It provides essential functionality for the operating system, including device drivers, process management, and memory management. The vulnerability identified as CVE-2019-16231 affects the Linux kernel version 5.2.14. This vulnerability arises from a lack of proper error handling in the 'fjes_main.c' file of the 'net/fjes' driver. Specifically, the code fails to check the return value of the 'alloc_workqueue' function, leading to a NULL pointer dereference.
Vulnerability Detail
The vulnerability in the Linux kernel version 5.2.14 allows an attacker to trigger a NULL pointer dereference by exploiting the improper error handling in the 'fjes_main.c' file. By sending a specially crafted request, an attacker can cause the kernel to dereference a NULL pointer, leading to a system crash or potential privilege escalation. This vulnerability has a CVSSv3 score of 4.1, indicating a moderate severity level.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No known workarounds are available for this vulnerability. It is essential to apply the official patches or update to a fixed version of the Linux kernel.
Conclusion
The NULL pointer dereference vulnerability in the Linux kernel version 5.2.14 can lead to system crashes or potential privilege escalation. It is crucial to update the Linux kernel to a fixed version or apply the necessary patches to mitigate the risk. Regularly updating the kernel is recommended to ensure the latest security fixes are in place. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
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FAQ
This vulnerability can lead to a system crash or potential privilege escalation, allowing an attacker to gain unauthorized access or disrupt the affected system.
The vulnerability affects Linux kernel version 5.2.14. It is recommended to update to a fixed version of the kernel to mitigate the risk.
At the time of this report, there are no known public exploits specifically targeting this vulnerability. However, it is crucial to apply the necessary patches or updates to prevent potential exploitation.
No known workarounds are available for this vulnerability. It is essential to apply the official patches or update to a fixed version of the Linux kernel.
For more information about this vulnerability, you can refer to the CVE-2019-16231 entry in the National Vulnerability Database (NVD) or the Linux distribution's security advisories.
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