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CVE-2023-53827
Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp} Similar to commit d0be8347c623 ("Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put"), just use l2cap_chan_hold_unless_zero to prevent referencing a channel that is about to be destroyed.

INFO

Published Date :

Dec. 9, 2025, 4:17 p.m.

Last Modified :

Dec. 9, 2025, 6:37 p.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2023-53827 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 a use-after-free vulnerability in Bluetooth L2CAP by using l2cap_chan_hold_unless_zero.
  • Update the Linux kernel to the latest version.
  • Apply the provided patch for the Bluetooth L2CAP module.
  • Recompile and install the updated kernel.
  • Restart the system to apply 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-2023-53827.

URL Resource
https://git.kernel.org/stable/c/1351551aa9058e07a20a27a158270cf84fcde621
https://git.kernel.org/stable/c/348d446762e7c70778df8bafbdf3fa0df2123f58
https://git.kernel.org/stable/c/a2a9339e1c9deb7e1e079e12e27a0265aea8421a
https://git.kernel.org/stable/c/ac6725a634f7e8c0330610a8527f20c730b61115
https://git.kernel.org/stable/c/c02421992505c95c7f3c9ad59ee35e22eac60988
https://git.kernel.org/stable/c/d82a439c3cfdb28aa7e82e2e849c5c4dd9fca284
https://git.kernel.org/stable/c/d9ba36c22a7bb09d6bac4cc2f243eff05da53f43
https://git.kernel.org/stable/c/f2d38e77aa5f3effc143e7dd24da8acf02925958
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-53827 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-2023-53827 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-2023-53827 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-2023-53827 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. 09, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp} Similar to commit d0be8347c623 ("Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put"), just use l2cap_chan_hold_unless_zero to prevent referencing a channel that is about to be destroyed.
    Added Reference https://git.kernel.org/stable/c/1351551aa9058e07a20a27a158270cf84fcde621
    Added Reference https://git.kernel.org/stable/c/348d446762e7c70778df8bafbdf3fa0df2123f58
    Added Reference https://git.kernel.org/stable/c/a2a9339e1c9deb7e1e079e12e27a0265aea8421a
    Added Reference https://git.kernel.org/stable/c/ac6725a634f7e8c0330610a8527f20c730b61115
    Added Reference https://git.kernel.org/stable/c/c02421992505c95c7f3c9ad59ee35e22eac60988
    Added Reference https://git.kernel.org/stable/c/d82a439c3cfdb28aa7e82e2e849c5c4dd9fca284
    Added Reference https://git.kernel.org/stable/c/d9ba36c22a7bb09d6bac4cc2f243eff05da53f43
    Added Reference https://git.kernel.org/stable/c/f2d38e77aa5f3effc143e7dd24da8acf02925958
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.