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7.0
HIGH CVSS 3.1
CVE-2025-37776
ksmbd: fix use-after-free in smb_break_all_levII_oplock()
Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_break_all_levII_oplock() There is a room in smb_break_all_levII_oplock that can cause racy issues when unlocking in the middle of the loop. This patch use read lock to protect whole loop.

INFO

Published Date :

May 1, 2025, 2:15 p.m.

Last Modified :

Nov. 14, 2025, 4:45 p.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2025-37776 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 [email protected]
Solution
Update the Linux kernel to resolve a use-after-free vulnerability in smb_break_all_levII_oplock().
  • Apply the latest Linux kernel security patches.
  • Ensure the smb_break_all_levII_oplock function is correctly synchronized.
  • Test the system for stability after the update.
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-2025-37776.

URL Resource
https://git.kernel.org/stable/c/18b4fac5ef17f77fed9417d22210ceafd6525fc7 Patch
https://git.kernel.org/stable/c/296cb5457cc6f4a754c4ae29855f8a253d52bcc6 Patch
https://git.kernel.org/stable/c/d54ab1520d43e95f9b2e22d7a05fc9614192e5a5 Patch
https://git.kernel.org/stable/c/d73686367ad68534257cd88a36ca3c52cb8b81d8 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-2025-37776 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-2025-37776 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-2025-37776 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-2025-37776 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]

    Nov. 14, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-416
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.25 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.14.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15 up to (excluding) 6.6.88
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/18b4fac5ef17f77fed9417d22210ceafd6525fc7 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/296cb5457cc6f4a754c4ae29855f8a253d52bcc6 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/d54ab1520d43e95f9b2e22d7a05fc9614192e5a5 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/d73686367ad68534257cd88a36ca3c52cb8b81d8 Types: Patch
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 01, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_break_all_levII_oplock() There is a room in smb_break_all_levII_oplock that can cause racy issues when unlocking in the middle of the loop. This patch use read lock to protect whole loop.
    Added Reference https://git.kernel.org/stable/c/18b4fac5ef17f77fed9417d22210ceafd6525fc7
    Added Reference https://git.kernel.org/stable/c/296cb5457cc6f4a754c4ae29855f8a253d52bcc6
    Added Reference https://git.kernel.org/stable/c/d54ab1520d43e95f9b2e22d7a05fc9614192e5a5
    Added Reference https://git.kernel.org/stable/c/d73686367ad68534257cd88a36ca3c52cb8b81d8
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: 7.0
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact