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7.5
HIGH CVSS 3.1
CVE-2025-38501
ksmbd: limit repeated connections from clients with the same IP
Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: limit repeated connections from clients with the same IP Repeated connections from clients with the same IP address may exhaust the max connections and prevent other normal client connections. This patch limit repeated connections from clients with the same IP.

INFO

Published Date :

Aug. 16, 2025, 6:15 a.m.

Last Modified :

Nov. 4, 2025, 10:16 p.m.

Remotely Exploit :

Yes !

Source :

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

The following products are affected by CVE-2025-38501 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
Mitigate repeated client connections to prevent resource exhaustion and maintain service availability.
  • Update the Linux kernel to a patched version.
  • Configure smbd to limit repeated client connections.
Public PoC/Exploit Available at Github

CVE-2025-38501 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

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-2025-38501.

URL Resource
https://git.kernel.org/stable/c/6073afe64510c302b7a0683a01e32c012eff715d
https://git.kernel.org/stable/c/7e5d91d3e6c62a9755b36f29c35288f06c3cd86b
https://git.kernel.org/stable/c/cb092fc3a62972a4aa47c9fe356c2c6a01cd840b
https://git.kernel.org/stable/c/e6bb9193974059ddbb0ce7763fa3882bd60d4dc3
https://git.kernel.org/stable/c/f1ce9258bcbce2491f9f71f7882b6eed0b33ec65
https://git.kernel.org/stable/c/fa1c47af4ff641cf9197ecdb1f8240cbb30389c1
http://www.openwall.com/lists/oss-security/2025/09/15/2
https://github.com/keymaker-arch/KSMBDrain
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-38501 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-2025-38501 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).

Profile Photo
keymaker-arch/KSMBDrain

CVE-2025-38501, KSMBDrain

Python

Updated: 1 month, 2 weeks ago
3 stars 0 fork 0 watcher
Born at : Sept. 15, 2025, 8:26 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
nomi-sec/PoC-in-GitHub

📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.

security cve exploit poc vulnerability

Updated: 3 days, 21 hours ago
7360 stars 1212 fork 1212 watcher
Born at : Dec. 8, 2019, 1:03 p.m. This repo has been linked 832 different CVEs too.

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

The following list is the news that have been mention CVE-2025-38501 vulnerability anywhere in the article.

  • CybersecurityNews
Linux Kernel’s KSMBD Subsystem Vulnerability Let Remote Attackers Exhaust Server Resources

A denial-of-service flaw in the Linux kernel’s KSMBD (SMB Direct) subsystem has raised alarms across the open-source community. Tracked as CVE-2025-38501, the issue allows a remote, unauthenticated ad ... Read more

Published Date: Sep 17, 2025 (1 month, 2 weeks ago)
  • Daily CyberSecurity
KSMBDrain (CVE-2025-38501): Linux Kernel Flaw Allows Remote DoS Attacks, PoC Available

A newly disclosed vulnerability in the Linux kernel’s KSMBD subsystem has been assigned CVE-2025-38501, allowing remote attackers to exhaust server resources and cause denial-of-service (DoS) conditio ... Read more

Published Date: Sep 17, 2025 (1 month, 2 weeks ago)

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-2025-38501 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.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 04, 2025

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2025/09/15/2
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 03, 2025

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 30, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-400
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Sep. 15, 2025

    Action Type Old Value New Value
    Added Reference https://github.com/keymaker-arch/KSMBDrain
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 16, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: ksmbd: limit repeated connections from clients with the same IP Repeated connections from clients with the same IP address may exhaust the max connections and prevent other normal client connections. This patch limit repeated connections from clients with the same IP.
    Added Reference https://git.kernel.org/stable/c/6073afe64510c302b7a0683a01e32c012eff715d
    Added Reference https://git.kernel.org/stable/c/7e5d91d3e6c62a9755b36f29c35288f06c3cd86b
    Added Reference https://git.kernel.org/stable/c/cb092fc3a62972a4aa47c9fe356c2c6a01cd840b
    Added Reference https://git.kernel.org/stable/c/e6bb9193974059ddbb0ce7763fa3882bd60d4dc3
    Added Reference https://git.kernel.org/stable/c/f1ce9258bcbce2491f9f71f7882b6eed0b33ec65
    Added Reference https://git.kernel.org/stable/c/fa1c47af4ff641cf9197ecdb1f8240cbb30389c1
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: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact