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CVE-2025-38567

4.7 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: nfsd: avoid ref leak in nfsd_open_local_fh() If two calls to nfsd_open_local_fh() race and both successfully call nfsd_file_acq…

Published Aug 19, 2025CWE-362EPSS 0.11%

Overview

CVE-2025-38567 is a medium-severity vulnerability. It was published on August 19, 2025 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

nfsd: avoid ref leak in nfsd_open_local_fh()

If two calls to nfsd_open_local_fh() race and both successfully call

nfsd_file_acquire_local(), they will both get an extra reference to the

net to accompany the file reference stored in *pnf.

One of them will fail to store (using xchg()) the file reference in

*pnf and will drop that reference but WON'T drop the accompanying

reference to the net. This leak means that when the nfs server is shut

down it will hang in nfsd_shutdown_net() waiting for

&nn->nfsd_net_free_done.

This patch adds the missing nfsd_net_put().

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/c4bf8f26c51e51bbb840935659a7b3b65a802c07Refgit.kernel.org/stable/c/e5a73150776f18547ee685c9f6bfafe549714899Refgit.kernel.org/stable/c/fcb0a417fddb605530c4837e0996620f8ed38023

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38567?

CVE-2025-38567 is a medium-severity vulnerability. It was published on August 19, 2025 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2025-38567?

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-38567?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-38567?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38567 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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