NFSv4: Don't hold the layoutget locks across multiple RPC calls in Kernel
Summary
GSD-2022-1003834: NFSv4: Don't hold the layoutget locks across multiple RPC calls. Affects Kernel versions < 6b3fc1496e7227cd6a39a80bbfb7588ef7c7a010. 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 Kernel is a critical component of the Linux operating system that provides core functionality and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the security and stability of the system. NFSv4 (Network File System version 4) is a protocol used for remote file access and sharing in Linux. It allows clients to access files on a remote server as if they were local. However, a vulnerability has been discovered in NFSv4 that can potentially lead to security issues.
Vulnerability Detail
The vulnerability in NFSv4 involves holding the layoutget locks across multiple RPC (Remote Procedure Call) calls. This can result in a deadlock situation where the locks are not released properly, causing a denial of service or other security issues. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability has been fixed in the Linux Kernel version v4.19.247 by commit 6b3fc1496e7227cd6a39a80bbfb7588ef7c7a010.
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 NFSv4 vulnerability involving holding the layoutget locks across multiple RPC calls in the Kernel can potentially lead to security issues. It is recommended to update the Linux Kernel to version v4.19.247 or later to fix this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The impact of this vulnerability is not yet proven, but it could potentially lead to a denial of service or other security issues.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including this one.
Yes, a patch is available in the Linux Kernel version v4.19.247. It is recommended to update to this version or later to fix the vulnerability.
No specific workaround is mentioned for this vulnerability. It is recommended to update the Kernel to the fixed version to ensure proper mitigation.
You can find more information about this vulnerability in the GSD Database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1003xxx/GSD-2022-1003834.json).
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
