CVE-2023-53827
Published: December 10, 2025Last modified: December 10, 2025
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.8 |
| Attack Vector | ADJACENT_NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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/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