CVE-2023-53297
Published: September 17, 2025Last modified: September 17, 2025
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| 25 LTS | linux-lts | Not affected (6.6.89-r0) | |
| Stream | linux-lts | Fixed (6.6.58-r0) |
References
- https://git.kernel.org/stable/c/116b9c002c894097adc2b8684db2d1da4229ed46
- https://git.kernel.org/stable/c/2112c4c47d36bc5aba3ddeb9afedce6ae6a67e7d
- https://git.kernel.org/stable/c/25e97f7b1866e6b8503be349eeea44bb52d661ce
- https://git.kernel.org/stable/c/5134556c9be582793f30695c09d18a26fe1ff2d7
- https://git.kernel.org/stable/c/55410a9144c76ecda126e6cdec556dfcd8f343b2
- https://git.kernel.org/stable/c/5f352a56f0e607e6ff539cbf12156bfd8af232be
- https://git.kernel.org/stable/c/6a27762340ad08643de3bc17fe1646ea489ca2e2
- https://git.kernel.org/stable/c/fd269a0435f8e9943b7a57c5a59688848d42d449