CVE-2023-53827
Published Dec 9, 2025
Modified Apr 15, 2026
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.
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References
Other 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
Frequently Asked Questions
What is CVE-2023-53827? +
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.
How do I check if I'm vulnerable to CVE-2023-53827? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.