Vulnerability in vhost-vdpa: Fix vm_flags for Virtqueue Doorbell Mapping
Summary
GSD-2021-1000084: vhost-vdpa: fix vm_flags for virtqueue doorbell mapping. Affects Kernel versions >= ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9, < 93dbbf20e3ffad14f04227a0b7105f6e6f0387ce. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
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 allows virtual machines to directly access physical devices, improving performance and reducing overhead. The vhost-vdpa package includes the necessary drivers and infrastructure for implementing this functionality. However, a vulnerability has been discovered in the package that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in vhost-vdpa arises from an incorrect configuration of the vm_flags for the virtqueue doorbell mapping. This misconfiguration could lead to memory corruption or unauthorized access to sensitive data. The vulnerability was introduced in version v5.8 of the Linux Kernel and has been fixed in version v5.12.3. Attackers who can exploit this vulnerability may be able to execute arbitrary code or escalate their privileges on the affected system.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
If updating the Linux Kernel is not immediately feasible, a possible workaround is to disable the vhost-vdpa functionality or remove the affected module from the kernel configuration. This can be done by modifying the kernel configuration file and rebuilding the kernel. However, it is important to note that this workaround may result in the loss of Virtio-vDPA support and potential performance degradation.
Conclusion
The vulnerability in vhost-vdpa, which affects the Linux Kernel, can lead to memory corruption or unauthorized access to sensitive data. It is crucial to update the kernel to version v5.12.3 or later to mitigate this vulnerability. If immediate updating is not possible, disabling the vhost-vdpa functionality or removing the affected module from the kernel configuration can serve as a temporary workaround. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
vhost-vdpa is a component of the Linux Kernel that enables support for the Virtio-vDPA framework, allowing virtual machines to directly access physical devices.
The vulnerability in vhost-vdpa could potentially lead to memory corruption or unauthorized access to sensitive data. Attackers who exploit this vulnerability may be able to execute arbitrary code or escalate their privileges.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.12.3 or later. Instructions for obtaining and compiling the latest kernel source code can be found in the official Linux Kernel repository.
If updating the Linux Kernel is not immediately feasible, a possible workaround is to disable the vhost-vdpa functionality or remove the affected module from the kernel configuration. However, this may result in the loss of Virtio-vDPA support and potential performance degradation.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the recommended fixes as soon as possible to mitigate any potential risks.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
