Increase wait time for VMbus unload in Linux Kernel
Summary
GSD-2021-1000375: Drivers: hv: vmbus: Increase wait time for VMbus unload. Affects Kernel versions >= 911e1987efc8f3e6445955fbae7f54b428b92bd3, < 8b4d4bd1f1ce21f74e1af561b74538e5c98ea603. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system. It provides essential functionality and acts as an interface between the hardware and software layers. The HV (Hyper-V) vmbus driver in the Linux Kernel is responsible for communication between the host and guest operating systems in a virtualized environment. It allows for efficient data transfer and device enumeration. However, a vulnerability has been discovered in the vmbus driver that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in the HV vmbus driver involves an insufficient wait time for VMbus unload. When unloading the VMbus, the driver does not provide enough time for pending messages to be processed, potentially leading to resource leaks or other issues. This vulnerability could be exploited by an attacker with local access to the system to cause a denial-of-service condition or potentially execute arbitrary code with elevated privileges.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is necessary to update the Linux Kernel to the fixed version.
Conclusion
The HV vmbus driver in the Linux Kernel is vulnerable to an insufficient wait time for VMbus unload. This vulnerability could allow an attacker with local access to the system to cause a denial-of-service condition or potentially execute arbitrary code with elevated privileges. To mitigate this risk, it is crucial to update the Linux Kernel to version v5.10.37 or later. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability could allow an attacker with local access to the system to cause a denial-of-service condition or potentially execute arbitrary code with elevated privileges.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground and it will alert you in real-time if any open-source vulnerabilities, including this one, are detected.
There are no known public exploits for this vulnerability at the time of this report. However, it is important to patch your system as soon as possible to prevent potential exploitation.
No, this vulnerability requires local access to the system to be exploited.
Yes, a fix is available in Linux Kernel version v5.10.37. It is recommended to update your Linux Kernel installation to the latest stable version to mitigate the risk.
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