Vulnerability in vhost-vdpa: fix vm_flags for virtqueue doorbell mapping

Kernel Updated 02 Oct 2025

Summary

31/05/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000120: vhost-vdpa: fix vm_flags for virtqueue doorbell mapping. Affects Kernel versions >= ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9, < 940230a5c31e2714722aee04c521a21f484b4df7. No fix is published. How to fix ↓

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Background

The vhost-vdpa package is a component of the Linux Kernel that provides support for the Virtio-vDPA (Virtual Data Path Acceleration) framework. Virtio-vDPA is a standard interface for efficient communication between virtual machines and physical devices. The vhost-vdpa package implements the vDPA backend driver, allowing virtual machines to access physical devices through the vDPA framework. This vulnerability affects the vhost-vdpa package in the Linux Kernel.

Vulnerability Detail

The vulnerability in the vhost-vdpa package arises from an incorrect configuration of the vm_flags for virtqueue doorbell mapping. This misconfiguration could potentially lead to security vulnerabilities, although the exact impact and attack plausibility have not been proven. The vulnerability was introduced in version v5.8 of the Linux Kernel and has been fixed in version v5.11.20. For more technical details, please refer to the references link.

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 v5.11.20 or later. This update includes the necessary fix to correctly configure the vm_flags for virtqueue doorbell mapping.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The vhost-vdpa package in the Linux Kernel is vulnerable to a misconfiguration in the vm_flags for virtqueue doorbell mapping. To address this vulnerability, it is recommended to update the Linux Kernel to version v5.11.20 or later. For further support or assistance in vulnerability remediation, please contact DevNack.com.

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