CVE-2026-52918

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: serialize accept_q access bt_sock_poll() walks the accept queue without synchronization, while child teardown can unlink the same socket and drop its last reference. The unsynchronized accept queue walk has existed since the initial Bluetooth import. Protect accept_q with a dedicated lock for queue updates and polling. Also rework bt_accept_dequeue() to take temporary child references under the queue lock before dropping it and locking the child socket.

CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0027

Probability of exploitation

0.18%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/41c8c1c7923e86e0eb59cfb4279349112756a336 https://git.kernel.org/stable/c/4ec17782fd186f901a7329605d11048b085b945a https://git.kernel.org/stable/c/85f8674cae82053f1e6bab295f6a8422cca14db5 https://git.kernel.org/stable/c/8b4c412e001b0c670eb937beab491af974da55b3 https://git.kernel.org/stable/c/a218bf69eb51fefe59a3976fa8925261141f681c https://git.kernel.org/stable/c/be43e6b4043113c3b3cf887c3c8350f67140274c https://git.kernel.org/stable/c/d9ce4de05df2385c19e2c7d12f529144e1a44af1 https://git.kernel.org/stable/c/e83f5e24da741fa9405aeeff00b08c5ee7c37b88

Frequently Asked Questions

What is CVE-2026-52918? +

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: serialize accept_q access bt_sock_poll() walks the accept queue without synchronization, while child teardown can unlink the same socket and drop its last reference. The unsynchronized accept queue walk has existed since the initial Bluetooth import. Protect accept_q with a dedicated lock for queue updates and polling. Also rework bt_accept_dequeue() to take temporary child references under the queue lock before dropping it and locking the child socket. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-52918? +

CVE-2026-52918 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0027, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-52918? +

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.