What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-10 · updated 2026-06-17
• Weakness: CWE-416

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.

Affected products

• Linux kernel: before 4.14.326; from 4.15 before 4.19.295; from 4.20 before 5.4.257; from 5.5 before 5.10.195; from 5.11 before 5.15.131; from 5.16 before 6.1.52 — fixed in 4.14.326, 4.19.295, 5.10.195, 5.15.131, 5.4.257, 6.1.52

How to fix

Upgrade to a fixed version: Linux kernel 4.14.326, 4.19.295, 5.10.195, 5.15.131. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/179c65828593aff1f444e15debd40a477cb23cf4
• https://git.kernel.org/stable/c/3efcbf25e5ab4d4ad1b7e6ba0869ff85540e3f6e
• https://git.kernel.org/stable/c/6c3653627397a0d6eab19b20a59423e118985a6b
• https://git.kernel.org/stable/c/73f7b171b7c09139eb3c6a5677c200dc1be5f318
• https://git.kernel.org/stable/c/746b363bef41cc159c051c47f9e30800bc6b520d
• https://git.kernel.org/stable/c/a5c2a467e9e789ae0891de55b766daac52e3b7b3
• https://git.kernel.org/stable/c/a6650d27ab2c12a8ee750f396edb5ac8b4558b2e

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