Vulnerability in Kernel: gve: Add NULL pointer checks when freeing irqs
Summary
GSD-2021-1000618: gve: Add NULL pointer checks when freeing irqs. Affects Kernel versions >= 893ce44df56580fb878ca5af9c4a5fd87567da50, < 821149ee88c206fa37e79c1868cc270518484876. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The gve module is a part of the Kernel and is responsible for handling network virtualization using the Generic Virtual Ethernet (gve) driver. This vulnerability in the gve module involves the lack of NULL pointer checks when freeing irqs, which can lead to potential security risks.
Vulnerability Detail
The vulnerability arises from the absence of NULL pointer checks when freeing irqs in the gve module of the Kernel. This oversight can potentially be exploited by attackers to execute arbitrary code or cause a denial-of-service (DoS) condition. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v5.4.124 by commit 821149ee88c206fa37e79c1868cc270518484876. However, it was introduced in version v5.3 by commit 893ce44df56580fb878ca5af9c4a5fd87567da50.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.4.124 or later. This can be done by obtaining the updated Kernel source code from the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and following the installation instructions provided. Alternatively, users can check for available updates through their Linux distribution's package manager and apply the necessary updates.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the vulnerability in the gve module of the Kernel, which involves the lack of NULL pointer checks when freeing irqs, can pose potential security risks. It is crucial to update the Linux Kernel to version v5.4.124 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the specific circumstances. However, it has the potential to allow attackers to execute arbitrary code or cause a denial-of-service (DoS) condition.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it in real-time to identify any open-source vulnerabilities, including this one.
Yes, a patch for this vulnerability has been released in Linux Kernel version v5.4.124. It is recommended to update to this version or later to mitigate the risk.
While there is no specific workaround mentioned for this vulnerability, it is generally recommended to follow security best practices such as keeping your system up to date with the latest patches, implementing proper access controls, and monitoring for any suspicious activity.
You can refer to the vulnerability details in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000618.json) for more information about this vulnerability, including its timeline, affected package, and fix details.
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