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CVE-2025-40318
Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once
Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once hci_cmd_sync_dequeue_once() does lookup and then cancel the entry under two separate lock sections. Meanwhile, hci_cmd_sync_work() can also delete the same entry, leading to double list_del() and "UAF". Fix this by holding cmd_sync_work_lock across both lookup and cancel, so that the entry cannot be removed concurrently.

INFO

Published Date :

Dec. 8, 2025, 1:16 a.m.

Last Modified :

Dec. 8, 2025, 1:16 a.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2025-40318 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 Bluetooth by holding lock during lookup and cancel operations.
  • Hold cmd_sync_work_lock during lookup and cancel.
  • Update the Linux kernel.
  • Apply the provided patch.
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-2025-40318.

URL Resource
https://git.kernel.org/stable/c/09b0cd1297b4dbfe736aeaa0ceeab2265f47f772
https://git.kernel.org/stable/c/0a94f7e017438935c09ef833a1aa908ad9875213
https://git.kernel.org/stable/c/932c0a4f77ac13e526fdd5b42914d29c9821d389
https://git.kernel.org/stable/c/9cd536970192b72257afcdfba0bfc09993e6f19c
https://git.kernel.org/stable/c/ae76cf6c2c842944c6514c57df54d728f1916553
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-40318 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-2025-40318 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-2025-40318 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-2025-40318 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

    Dec. 08, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once hci_cmd_sync_dequeue_once() does lookup and then cancel the entry under two separate lock sections. Meanwhile, hci_cmd_sync_work() can also delete the same entry, leading to double list_del() and "UAF". Fix this by holding cmd_sync_work_lock across both lookup and cancel, so that the entry cannot be removed concurrently.
    Added Reference https://git.kernel.org/stable/c/09b0cd1297b4dbfe736aeaa0ceeab2265f47f772
    Added Reference https://git.kernel.org/stable/c/0a94f7e017438935c09ef833a1aa908ad9875213
    Added Reference https://git.kernel.org/stable/c/932c0a4f77ac13e526fdd5b42914d29c9821d389
    Added Reference https://git.kernel.org/stable/c/9cd536970192b72257afcdfba0bfc09993e6f19c
    Added Reference https://git.kernel.org/stable/c/ae76cf6c2c842944c6514c57df54d728f1916553
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.