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CVE-2025-38393

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN We found a few different systems hung up in writeback waiting on the same pa…

Published Jul 25, 2025CWE-362EPSS 0.37%

Overview

CVE-2025-38393 is a high-severity vulnerability. It was published on July 25, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN

We found a few different systems hung up in writeback waiting on the same

page lock, and one task waiting on the NFS_LAYOUT_DRAIN bit in

pnfs_update_layout(), however the pnfs_layout_hdr's plh_outstanding count

was zero.

It seems most likely that this is another race between the waiter and waker

similar to commit ed0172af5d6f ("SUNRPC: Fix a race to wake a sync task").

Fix it up by applying the advised barrier.

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/08287df60bac5b008b6bcdb03053988335d3d282Refgit.kernel.org/stable/c/1f4da20080718f258e189a2c5f515385fa393da6Refgit.kernel.org/stable/c/864a54c1243ed3ca60baa4bc492dede1361f4c83Refgit.kernel.org/stable/c/8846fd02c98da8b79e6343a20e6071be6f372180Refgit.kernel.org/stable/c/8ca65fa71024a1767a59ffbc6a6e2278af84735eRefgit.kernel.org/stable/c/c01776287414ca43412d1319d2877cbad65444acRefgit.kernel.org/stable/c/e4b13885e7ef1e64e45268feef1e5f0707c47e72Reflists.debian.org/debian-lts-announce/2025/10/msg00007.htmlReflists.debian.org/debian-lts-announce/2025/10/msg00008.htmlRefcert-portal.siemens.com/productcert/html/ssa-082556.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38393?

CVE-2025-38393 is a high-severity vulnerability. It was published on July 25, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-38393?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-38393?

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-2025-38393?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38393 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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