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CVE-2023-53297
Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp conn->chan_lock isn't acquired before l2cap_get_chan_by_scid, if l2cap_get_chan_by_scid returns NULL, then 'bad unlock balance' is triggered.

INFO

Published Date :

Sept. 16, 2025, 8:11 a.m.

Last Modified :

Sept. 16, 2025, 8:11 a.m.

Remotely Exploit :

No

Source :

Linux
Affected Products

The following products are affected by CVE-2023-53297 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.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0
Solution
Fix incorrect unlock balance in Bluetooth L2CAP by acquiring channel lock before accessing channel information.
  • Acquire conn->chan_lock before calling l2cap_get_chan_by_scid.
  • Ensure conn->chan_lock is properly handled in error paths.
  • Update the Linux kernel to the latest version.

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-2023-53297 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

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
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