Unlimited Package Queueing Vulnerability in xen/netback

Kernel Updated 02 Oct 2025

Summary

27/12/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1002625: xen/netback: don't queue unlimited number of packages. Affects Kernel versions >= f48da8b14d04ca87ffcffe68829afd45f926ec6a, < b4226b387436315e7f57465c15335f4f4b5b075d. No fix is published. How to fix ↓

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Background

The xen/netback package is a component of the Linux Kernel that provides network backend support for Xen virtualization. It allows virtual machines to communicate with the physical network through the Xen hypervisor. The package handles the queuing and processing of network packets between the virtual machine and the physical network interface.

Vulnerability Detail

The vulnerability in xen/netback allows an unlimited number of packages to be queued, which can lead to resource exhaustion and denial of service. An attacker can exploit this vulnerability by sending a large number of network packets to a virtual machine, causing the package queue to grow indefinitely. This can result in the depletion of system resources and the inability to process legitimate network traffic.

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 v4.9.294 or later. The fix for this vulnerability was implemented in commit b4226b387436315e7f57465c15335f4f4b5b075d. Updating the kernel ensures that the package queue is limited and prevents resource exhaustion.

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Workaround

There is no known workaround for this vulnerability. It is essential to update the Linux Kernel to the fixed version to mitigate the risk.

Conclusion

The unlimited package queueing vulnerability in xen/netback can lead to resource exhaustion and denial of service. It is crucial to update the Linux Kernel to the fixed version to mitigate the risk. For further support on vulnerability remediation, contact DevNack.com.

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