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7.8
HIGH CVSS 3.1
CVE-2025-22040
Samba Linux Kernel Use After Free Vulnerability
Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix session use-after-free in multichannel connection There is a race condition between session setup and ksmbd_sessions_deregister. The session can be freed before the connection is added to channel list of session. This patch check reference count of session before freeing it.

INFO

Published Date :

April 16, 2025, 3:15 p.m.

Last Modified :

April 25, 2025, 6:42 p.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2025-22040 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
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
Address the race condition in ksmbd session handling to prevent use-after-free.
  • Update the Linux kernel to the latest patched version.
  • Apply the provided patch for ksmbd session handling.
  • Verify session integrity after applying changes.
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-2025-22040.

URL Resource
https://git.kernel.org/stable/c/3980770cb1470054e6400fd97668665975726737 Patch
https://git.kernel.org/stable/c/596407adb9af1ee75fe7c7529607783d31b66e7f Patch
https://git.kernel.org/stable/c/7dfbd4c43eed91dd2548a95236908025707a8dfd Patch
https://git.kernel.org/stable/c/9069939d762138e232a6f79e3e1462682ed6a17d Patch
https://git.kernel.org/stable/c/94c281721d4ed2d972232414b91d98a6f5bdb16b Patch
https://git.kernel.org/stable/c/fa4cdb8cbca7d6cb6aa13e4d8d83d1103f6345db Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-22040 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-2025-22040 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-2025-22040 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-2025-22040 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.

  • Initial Analysis by [email protected]

    Apr. 25, 2025

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.13.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.14 up to (excluding) 6.14.2 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.87 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.23 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 6.1.134
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/3980770cb1470054e6400fd97668665975726737 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/596407adb9af1ee75fe7c7529607783d31b66e7f Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/7dfbd4c43eed91dd2548a95236908025707a8dfd Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/9069939d762138e232a6f79e3e1462682ed6a17d Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/94c281721d4ed2d972232414b91d98a6f5bdb16b Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/fa4cdb8cbca7d6cb6aa13e4d8d83d1103f6345db Types: Patch
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Apr. 21, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-416
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Apr. 16, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix session use-after-free in multichannel connection There is a race condition between session setup and ksmbd_sessions_deregister. The session can be freed before the connection is added to channel list of session. This patch check reference count of session before freeing it.
    Added Reference https://git.kernel.org/stable/c/3980770cb1470054e6400fd97668665975726737
    Added Reference https://git.kernel.org/stable/c/596407adb9af1ee75fe7c7529607783d31b66e7f
    Added Reference https://git.kernel.org/stable/c/7dfbd4c43eed91dd2548a95236908025707a8dfd
    Added Reference https://git.kernel.org/stable/c/9069939d762138e232a6f79e3e1462682ed6a17d
    Added Reference https://git.kernel.org/stable/c/94c281721d4ed2d972232414b91d98a6f5bdb16b
    Added Reference https://git.kernel.org/stable/c/fa4cdb8cbca7d6cb6aa13e4d8d83d1103f6345db
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
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact