NFS: Use-after-free vulnerability in nfs4_init_client()

Kernel Updated 02 Oct 2025

Summary

30/06/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000865: NFS: Fix use-after-free in nfs4_init_client(). Affects Kernel versions >= 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da, < c7eab9e2d7b4e983ce280276fb920af649955897. No fix is published. How to fix ↓

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Background

The NFS (Network File System) package is a distributed file system protocol that allows clients to access files over a network. It is commonly used in Linux systems to share files between servers and clients. The nfs4_init_client() function is responsible for initializing an NFSv4 client structure. This vulnerability affects the Linux Kernel package.

Vulnerability Detail

The use-after-free vulnerability in nfs4_init_client() allows an attacker to exploit a freed memory region, leading to potential code execution or a system crash. This vulnerability was introduced in version v4.13 of the Linux Kernel and was fixed in version v4.14.237. An attacker could potentially craft a malicious NFS request to trigger the use-after-free condition and execute arbitrary code or crash the system.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no known workaround for this vulnerability. It is recommended to apply the fix as soon as possible.

Conclusion

The use-after-free vulnerability in nfs4_init_client() can be exploited by an attacker to execute arbitrary code or crash the system. It is crucial to update the Linux Kernel package to version v4.14.237 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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