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, 8:15 a.m.
Last Modified :
Sept. 16, 2025, 12:49 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- 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.
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-2023-53297.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-53297 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-2023-53297
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).
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The following list is the news that have been mention
CVE-2023-53297 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-53297 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.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 16, 2025
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/116b9c002c894097adc2b8684db2d1da4229ed46 Added Reference https://git.kernel.org/stable/c/2112c4c47d36bc5aba3ddeb9afedce6ae6a67e7d Added Reference https://git.kernel.org/stable/c/25e97f7b1866e6b8503be349eeea44bb52d661ce Added Reference https://git.kernel.org/stable/c/5134556c9be582793f30695c09d18a26fe1ff2d7 Added Reference https://git.kernel.org/stable/c/55410a9144c76ecda126e6cdec556dfcd8f343b2 Added Reference https://git.kernel.org/stable/c/5f352a56f0e607e6ff539cbf12156bfd8af232be Added Reference https://git.kernel.org/stable/c/6a27762340ad08643de3bc17fe1646ea489ca2e2 Added Reference https://git.kernel.org/stable/c/fd269a0435f8e9943b7a57c5a59688848d42d449