NFSD: Possible oops in nfs_dirent() tracepoint
Summary
GSD-2021-1001177: NFSD: Prevent a possible oops in the nfs_dirent() tracepoint. Affects Kernel versions >= 6019ce0742ca55d3e45279a19b07d1542747a098, < 7605bff387a9972038b217b6c60998778dbae931. No fix is published. How to fix ↓
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Background
The NFSD (Network File System Daemon) is a component of the Linux Kernel that provides support for the NFS protocol. NFS allows remote file systems to be mounted and accessed over a network. The nfs_dirent() tracepoint is a debugging feature that provides information about directory entries in NFS. This vulnerability affects the Kernel package in the Linux ecosystem.
Vulnerability Detail
The vulnerability in the nfs_dirent() tracepoint could lead to a potential oops (kernel panic) in the NFSD component. An oops is an unexpected error condition that causes the kernel to terminate abruptly. The exact impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in version v5.13 of the Linux Kernel and has been fixed in version v5.13.4 by commit 7605bff387a9972038b217b6c60998778dbae931.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The vulnerability in the nfs_dirent() tracepoint of the NFSD component in the Linux Kernel could potentially lead to a kernel panic. It is recommended to update the Kernel package to version v5.13.4 or later to fix this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
NFSD (Network File System Daemon) is a component of the Linux Kernel that provides support for the NFS protocol. It allows remote file systems to be mounted and accessed over a network.
The nfs_dirent() tracepoint is a debugging feature in NFSD that provides information about directory entries in NFS. It is used for troubleshooting and debugging purposes.
An oops is an unexpected error condition that causes the Linux Kernel to terminate abruptly. It is usually triggered by a software bug or a hardware issue and results in a kernel panic.
The exact impact of this vulnerability is not yet proven. However, it has the potential to cause a kernel panic (oops) in the NFSD component, which can lead to system instability or crashes.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities without requiring access to the code or installation.
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