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CVE-2025-68817
ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency
Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency Under high concurrency, A tree-connection object (tcon) is freed on a disconnect path while another path still holds a reference and later executes *_put()/write on it.

INFO

Published Date :

Jan. 13, 2026, 4:16 p.m.

Last Modified :

Jan. 13, 2026, 4:16 p.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2025-68817 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
Apply kernel updates to fix use-after-free due to concurrency issues in ksmbd.
  • Update the Linux kernel.
  • Apply the ksmbd patch.
  • Reboot the system.
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-2025-68817.

URL Resource
https://git.kernel.org/stable/c/063cbbc6f595ea36ad146e1b7d2af820894beb21
https://git.kernel.org/stable/c/21a3d01fc6db5129f81edb0ab7cb94fd758bcbea
https://git.kernel.org/stable/c/b39a1833cc4a2755b02603eec3a71a85e9dff926
https://git.kernel.org/stable/c/d092de8a26c952379ded8e6b0bda31d89befac1a
https://git.kernel.org/stable/c/d64977495e44855f2b28d8ce56107c963a7a50e4
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-68817 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-2025-68817 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-2025-68817 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-2025-68817 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

    Jan. 13, 2026

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency Under high concurrency, A tree-connection object (tcon) is freed on a disconnect path while another path still holds a reference and later executes *_put()/write on it.
    Added Reference https://git.kernel.org/stable/c/063cbbc6f595ea36ad146e1b7d2af820894beb21
    Added Reference https://git.kernel.org/stable/c/21a3d01fc6db5129f81edb0ab7cb94fd758bcbea
    Added Reference https://git.kernel.org/stable/c/b39a1833cc4a2755b02603eec3a71a85e9dff926
    Added Reference https://git.kernel.org/stable/c/d092de8a26c952379ded8e6b0bda31d89befac1a
    Added Reference https://git.kernel.org/stable/c/d64977495e44855f2b28d8ce56107c963a7a50e4
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.