---
id: CVE-2026-52918
title: |-
  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 r…
summary: |-
  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 r…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 2.6.12.1, < 5.10.259'
  - 'linux_kernel >= 5.11, < 5.15.210'
  - 'linux_kernel >= 5.16, < 6.1.176'
  - 'linux_kernel >= 6.2, < 6.6.142'
  - 'linux_kernel >= 6.7, < 6.12.92'
  - 'linux_kernel >= 6.13, < 6.18.34'
  - 'linux_kernel >= 6.19, < 7.0.11'
  - linux_kernel = 2.6.12
  - linux_kernel = 7.1
patched:
  - linux_kernel 7.0.11
published: '2026-06-24'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:56.497'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52918'
references:
  - url: 'https://git.kernel.org/stable/c/41c8c1c7923e86e0eb59cfb4279349112756a336'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4ec17782fd186f901a7329605d11048b085b945a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/85f8674cae82053f1e6bab295f6a8422cca14db5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8b4c412e001b0c670eb937beab491af974da55b3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a218bf69eb51fefe59a3976fa8925261141f681c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/be43e6b4043113c3b3cf887c3c8350f67140274c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d9ce4de05df2385c19e2c7d12f529144e1a44af1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e83f5e24da741fa9405aeeff00b08c5ee7c37b88'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00262
epssPercentile: 0.1679
ingestedAt: '2026-10-15T03:30:12.902Z'
---

## Overview

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

- `linux_kernel >= 2.6.12.1, < 5.10.259`
- `linux_kernel >= 5.11, < 5.15.210`
- `linux_kernel >= 5.16, < 6.1.176`
- `linux_kernel >= 6.2, < 6.6.142`
- `linux_kernel >= 6.7, < 6.12.92`
- `linux_kernel >= 6.13, < 6.18.34`
- `linux_kernel >= 6.19, < 7.0.11`
- `linux_kernel = 2.6.12`
- `linux_kernel = 7.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.11`