CVE-2023-53145 Bluetooth: btsdio: fix use after free bug in btsdio_remove due to race condition

What is CVE-2023-53145?

CVE-2023-53145 is a high-severity use after free vulnerability in Linux kernel, published on 10 May 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: btsdio: fix use after free bug in btsdio_remove due to race condition

In btsdio_probe, the data->work is bound with btsdio_work. It will be started in btsdio_send_frame.

If the btsdio_remove runs with a unfinished work, there may be a race condition that hdev is freed but used in btsdio_work. Fix it by canceling the work before do cleanup in btsdio_remove.

Weakness: CWE-416

Which versions are affected by CVE-2023-53145?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-53145?

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-2023-53145 being exploited?

There is no known exploitation of CVE-2023-53145 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-53145, DEBIAN-CVE-2023-53145, GHSA-x63c-5qg7-5jgc, UBUNTU-CVE-2023-53145.