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CVE-2025-38724

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm() Lei Lu recently reported that nfsd4_setclientid_confirm…

Published Sep 4, 2025CWE-416EPSS 0.39%

Overview

CVE-2025-38724 is a critical-severity vulnerability. It was published on September 4, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. 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:

nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm()

Lei Lu recently reported that nfsd4_setclientid_confirm() did not check

the return value from get_client_locked(). a SETCLIENTID_CONFIRM could

race with a confirmed client expiring and fail to get a reference. That

could later lead to a UAF.

Fix this by getting a reference early in the case where there is an

extant confirmed client. If that fails then treat it as if there were no

confirmed client found at all.

In the case where the unconfirmed client is expiring, just fail and

return the result from get_client_locked().

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/22f45cedf281e6171817c8a3432c44d788c550e1Refgit.kernel.org/stable/c/36e83eda90e0e4ac52f259f775b40b2841f8a0a3Refgit.kernel.org/stable/c/3f252a73e81aa01660cb426735eab932e6182e8dRefgit.kernel.org/stable/c/571a5e46c71490285d2d8c06f6b5a7cbf6c7edd1Refgit.kernel.org/stable/c/74ad36ed60df561a303a19ecef400c7096b20306Refgit.kernel.org/stable/c/908e4ead7f757504d8b345452730636e298cbf68Refgit.kernel.org/stable/c/d35ac850410966010e92f401f4e21868a9ea4d8bRefgit.kernel.org/stable/c/d71abd1ae4e0413707cd42b10c24a11d1aa71772Refgit.kernel.org/stable/c/f3aac6cf390d8b80e1d82975faf4ac61175519c0Reflists.debian.org/debian-lts-announce/2025/10/msg00007.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38724?

CVE-2025-38724 is a critical-severity vulnerability. It was published on September 4, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-38724?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-38724?

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-2025-38724?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38724 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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