net: tun: unlink NAPI from device on destruction
Summary
GSD-2022-1004816: net: tun: unlink NAPI from device on destruction. Affects Kernel versions >= 943170998b200190f99d3fe7e771437e2c51f319, < 82e729aee59acefe135fceffadcbc5b86dd4f1b9. 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 net package in the Linux Kernel is responsible for network communication and provides various network protocols and utilities. The tun module within the net package is used to create virtual network interfaces. These interfaces are commonly used in virtual private networks (VPNs) and other network-related applications. The tun module allows user-space programs to read and write network packets directly, bypassing the normal network stack. This vulnerability affects the tun module in the Linux Kernel.
Vulnerability Detail
The vulnerability in the tun module of the Linux Kernel allows an attacker to unlink the NAPI (New API) from the device during destruction. NAPI is a mechanism used to improve network performance by reducing the CPU overhead of interrupt handling. By unlinking NAPI from the device, an attacker can disrupt the normal network communication and potentially cause a denial-of-service (DoS) condition. The impact and attack plausibility of this vulnerability have not been proven yet.
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
There is no specific workaround mentioned for this vulnerability.
Conclusion
The vulnerability in the tun module of the Linux Kernel allows an attacker to unlink NAPI from the device during destruction, potentially leading to a denial-of-service condition. It is recommended to update the Linux Kernel to the latest version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The net package in the Linux Kernel is responsible for network communication and provides various network protocols and utilities.
The tun module is used to create virtual network interfaces in the Linux Kernel. These interfaces are commonly used in VPNs and other network-related applications.
NAPI (New API) is a mechanism used to improve network performance by reducing the CPU overhead of interrupt handling.
The impact of this vulnerability is not yet proven, but it could potentially lead to a denial-of-service (DoS) condition by disrupting network communication.
To fix this vulnerability, update the Linux Kernel to version v4.19.251 or later.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
