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CVE-2025-39825
smb: client: fix race with concurrent opens in rename(2)
Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix race with concurrent opens in rename(2) Besides sending the rename request to the server, the rename process also involves closing any deferred close, waiting for outstanding I/O to complete as well as marking all existing open handles as deleted to prevent them from deferring closes, which increases the race window for potential concurrent opens on the target file. Fix this by unhashing the dentry in advance to prevent any concurrent opens on the target.

INFO

Published Date :

Sept. 16, 2025, 1:16 p.m.

Last Modified :

Sept. 16, 2025, 1:16 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-39825 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Fix race condition in rename by unhashing the dentry in advance.
  • Apply the kernel patch to fix the race condition.
  • Update to a fixed kernel version.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-39825.

URL Resource
https://git.kernel.org/stable/c/24b9ed739c8c5b464d983e12cf308982f3ae93c2
https://git.kernel.org/stable/c/289f945acb20b9b54fe4d13895e44aa58965ddb2
https://git.kernel.org/stable/c/c9991af5e09924f6f3b3e6996a5e09f9504b4358
https://git.kernel.org/stable/c/c9e7de284da0be5b44dbe79d71573f9f7f9b144c
https://git.kernel.org/stable/c/d84291fc7453df7881a970716f8256273aca5747
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-39825 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-39825 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-39825 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-39825 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Sep. 16, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: smb: client: fix race with concurrent opens in rename(2) Besides sending the rename request to the server, the rename process also involves closing any deferred close, waiting for outstanding I/O to complete as well as marking all existing open handles as deleted to prevent them from deferring closes, which increases the race window for potential concurrent opens on the target file. Fix this by unhashing the dentry in advance to prevent any concurrent opens on the target.
    Added Reference https://git.kernel.org/stable/c/24b9ed739c8c5b464d983e12cf308982f3ae93c2
    Added Reference https://git.kernel.org/stable/c/289f945acb20b9b54fe4d13895e44aa58965ddb2
    Added Reference https://git.kernel.org/stable/c/c9991af5e09924f6f3b3e6996a5e09f9504b4358
    Added Reference https://git.kernel.org/stable/c/c9e7de284da0be5b44dbe79d71573f9f7f9b144c
    Added Reference https://git.kernel.org/stable/c/d84291fc7453df7881a970716f8256273aca5747
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.