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CVE-2025-38711

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: smb/server: avoid deadlock when linking with ReplaceIfExists If smb2_create_link() is called with ReplaceIfExists set and the n…

Published Sep 4, 2025CWE-667EPSS 0.12%

Overview

CVE-2025-38711 is a medium-severity vulnerability. It was published on September 4, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, 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:

smb/server: avoid deadlock when linking with ReplaceIfExists

If smb2_create_link() is called with ReplaceIfExists set and the name

does exist then a deadlock will happen.

ksmbd_vfs_kern_path_locked() will return with success and the parent

directory will be locked. ksmbd_vfs_remove_file() will then remove the

file. ksmbd_vfs_link() will then be called while the parent is still

locked. It will try to lock the same parent and will deadlock.

This patch moves the ksmbd_vfs_kern_path_unlock() call to *before*

ksmbd_vfs_link() and then simplifies the code, removing the file_present

flag variable.

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/1e858a7a51c7b8b009d8f246de7ceb7743b44a71Refgit.kernel.org/stable/c/814cfdb6358d9b84fcbec9918c8f938cc096a43aRefgit.kernel.org/stable/c/9d5012ffe14120f978ee34aef4df3d6cb026b7c4Refgit.kernel.org/stable/c/a726fef6d7d4cfc365d3434e3916dbfe78991a33Refgit.kernel.org/stable/c/a7dddd62578c2eb6cb28b8835556a121b5157323Refgit.kernel.org/stable/c/ac98d54630d5b52e3f684d872f0d82c06c418ea9Refgit.kernel.org/stable/c/d5fc1400a34b4ea5e8f2ce296ea12bf8c8421694Reflists.debian.org/debian-lts-announce/2025/10/msg00008.htmlRefcert-portal.siemens.com/productcert/html/ssa-032379.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38711?

CVE-2025-38711 is a medium-severity vulnerability. It was published on September 4, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38711?

This vulnerability has a CVSS 3.1 base score of 5.5, 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-2025-38711?

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-2025-38711?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38711 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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