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.

CVSS 3.1

8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 12% of CVEs (scores of 2026-10-25)

CWE

CWE-362

Published

2026-06-24

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

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

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