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CVE-2025-38571

8.2 · HIGH

In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix client side handling of tls alerts A security exploit was discovered in NFS over TLS in tls_alert_recv due to its a…

Published Aug 19, 2025EPSS 0.33%

Overview

CVE-2025-38571 is a high-severity vulnerability. It was published on August 19, 2025 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, 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:

sunrpc: fix client side handling of tls alerts

A security exploit was discovered in NFS over TLS in tls_alert_recv

due to its assumption that there is valid data in the msghdr's

iterator's kvec.

Instead, this patch proposes the rework how control messages are

setup and used by sock_recvmsg().

If no control message structure is setup, kTLS layer will read and

process TLS data record types. As soon as it encounters a TLS control

message, it would return an error. At that point, NFS can setup a kvec

backed control buffer and read in the control message such as a TLS

alert. Scott found that a msg iterator can advance the kvec pointer

as a part of the copy process thus we need to revert the iterator

before calling into the tls_alert_recv.

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/3ee397eaaca4fa04db21bb98c8f1d0c6cc525368Refgit.kernel.org/stable/c/3feada5baf4dc96e151ff2ca54630e1d274e5458Refgit.kernel.org/stable/c/a55b3d15331859d9fdd261cfa6d34ca2aeb0fb95Refgit.kernel.org/stable/c/c36b2fbd60e8f9c6f975522130998608880c93beRefgit.kernel.org/stable/c/cc5d59081fa26506d02de2127ab822f40d88bc5a

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38571?

CVE-2025-38571 is a high-severity vulnerability. It was published on August 19, 2025 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2025-38571?

This vulnerability has a CVSS 3.1 base score of 8.2, 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-2025-38571?

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-2025-38571?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38571 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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