Vulnerability in nfsd: NULL dereference in nfs3svc_encode_getaclres

Kernel Updated 02 Oct 2025

Summary

03/08/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001178: nfsd: fix NULL dereference in nfs3svc_encode_getaclres. Affects Kernel versions >= 20798dfe249a01ad1b12eec7dbc572db5003244a, < 650e6f383a6eb40f7c0a010982a74ab4b6893870. No fix is published. How to fix ↓

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Background

The nfsd package is a component of the Linux Kernel that provides support for the Network File System (NFS) protocol. NFS allows remote file systems to be mounted and accessed over a network. The nfsd component specifically handles NFS server functionality. It receives requests from NFS clients and processes them accordingly. This vulnerability affects the nfsd component in the Linux Kernel.

Vulnerability Detail

The vulnerability identified in the nfsd component is a NULL dereference issue in the nfs3svc_encode_getaclres function. This vulnerability was introduced in version v5.13 of the Linux Kernel by commit 20798dfe249a01ad1b12eec7dbc572db5003244a and has been fixed in version v5.13.4 by commit 650e6f383a6eb40f7c0a010982a74ab4b6893870. A NULL dereference occurs when a program attempts to access or manipulate a memory location that has a NULL pointer, leading to a crash or potential code execution. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

No specific workaround has been provided for this vulnerability.

Conclusion

The vulnerability in the nfsd component of the Linux Kernel, which resulted in a NULL dereference in the nfs3svc_encode_getaclres function, has been identified and fixed in version v5.13.4. 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.

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