CVE-2023-54214
Published Dec 30, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix potential user-after-free This fixes all instances of which requires to allocate a buffer calling alloc_skb which may release the chan lock and reacquire later which makes it possible that the chan is disconnected in the meantime.
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References
Other References
https://git.kernel.org/stable/c/31a288a4df7f6a28e65da22a4ab2add4a963738e
https://git.kernel.org/stable/c/60aaccf16d1e099c16bebfb96428ae762cb528f7
https://git.kernel.org/stable/c/64e28ecf44e46de9f01915a4146706a21c3469d2
https://git.kernel.org/stable/c/994e3e18908f5c4a12d07b44018e6aa85f071048
https://git.kernel.org/stable/c/a6a7d1541fefddf7ca0cfb34c1bff63ff809cc49
https://git.kernel.org/stable/c/b2fde8cb2a25125111f2144604e0e7c0ebcc4bba
https://git.kernel.org/stable/c/b8ed41cc04fb74005aa51d17865ca3d022760335
https://git.kernel.org/stable/c/df5703348813235874d851934e957c3723d71644
Frequently Asked Questions
What is CVE-2023-54214? +
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix potential user-after-free
This fixes all instances of which requires to allocate a buffer calling
alloc_skb which may release the chan lock and reacquire later which
makes it possible that the chan is disconnected in the meantime.
How do I check if I'm vulnerable to CVE-2023-54214? +
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.