CVE-2026-52918
Bluetooth: serialize accept_q access
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/d9ce4de05df2385c19e2c7d12f529144e1a44af1
- https://git.kernel.org/stable/c/41c8c1c7923e86e0eb59cfb4279349112756a336
- https://git.kernel.org/stable/c/4ec17782fd186f901a7329605d11048b085b945a
- https://git.kernel.org/stable/c/be43e6b4043113c3b3cf887c3c8350f67140274c
- https://git.kernel.org/stable/c/85f8674cae82053f1e6bab295f6a8422cca14db5
References (9)
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