CVE-2023-53305 Bluetooth: L2CAP: Fix use-after-free
A use-after-free vulnerability in the Linux kernel's Bluetooth L2CAP module allows attackers to potentially execute code or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-53305?
CVE-2023-53305 is a high-severity use after free vulnerability in Linux kernel, published on 16 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: L2CAP: Fix use-after-free
Fix potential use-after-free in l2cap_le_command_rej.
Weakness: CWE-416
Which versions are affected by CVE-2023-53305?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53305?
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-2023-53305 being exploited?
There is no known exploitation of CVE-2023-53305 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53305, DEBIAN-CVE-2023-53305, GHSA-xw54-m5g5-fqcg, OESA-2025-2771, UBUNTU-CVE-2023-53305.