CVE-2021-47260: NFS: Fix a potential NULL dereference in nfs_get_client()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-21 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix a potential NULL dereference in nfs_get_client() None of the callers are expecting NULL returns from nfs_get_client() so this code will lead to an Oops. It's better to return an error pointer. I expect that this is dead code so hopefully no one is affected.

Affected products

Linux kernel: from 3.17 before 4.4.273; from 4.5 before 4.9.273; from 4.10 before 4.14.237; from 4.15 before 4.19.195; from 4.20 before 5.4.126; from 5.5 before 5.10.44 — fixed in 4.14.237, 4.19.195, 4.4.273, 4.9.273, 5.10.44, 5.12.11

How to fix

Upgrade to a fixed version: Linux kernel 4.14.237, 4.19.195, 4.4.273, 4.9.273. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-47260 or the next vulnerability affects your stack