CVE-2023-53386 Bluetooth: Fix potential use-after-free when clear keys
A use-after-free vulnerability in the Linux kernel Bluetooth subsystem allows attackers to potentially execute code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-53386?
CVE-2023-53386 is a high-severity use after free vulnerability in Linux kernel, published on 18 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: Fix potential use-after-free when clear keys
Similar to commit c5d2b6fa26b5 ("Bluetooth: Fix use-after-free in hci_remove_ltk/hci_remove_irk"). We can not access k after kfree_rcu() call.
Weakness: CWE-416
Which versions are affected by CVE-2023-53386?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53386?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2023-53386 being exploited?
There is no known exploitation of CVE-2023-53386 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53386, DEBIAN-CVE-2023-53386, GHSA-m38w-46xg-v336, UBUNTU-CVE-2023-53386.