---
id: CVE-2026-64406
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: fix UAF in bt_accept_dequeue()

  bt_accept_get() takes a temporary reference before dropping the accept
  queue lock
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: fix UAF in bt_accept_dequeue()

  bt_accept_get() takes a temporary reference before dropping the accept
  queue lock. bt_accept_dequeue() currently drops that r…
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.10.259, < 5.10.261'
  - 'linux_kernel >= 5.15.210, < 5.15.212'
  - 'linux_kernel >= 6.1.175, < 6.1.178'
  - 'linux_kernel >= 6.6.142, < 6.6.145'
  - 'linux_kernel >= 6.12.92, < 6.12.96'
  - 'linux_kernel >= 6.18.34, < 6.18.39'
  - 'linux_kernel >= 7.0.11, < 7.1'
  - 'linux_kernel >= 7.1.1, < 7.1.4'
  - linux_kernel = 7.1
  - linux_kernel = 7.2
patched:
  - linux_kernel 7.1.4
published: '2026-07-25'
updated: '2026-09-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64406'
references:
  - url: 'https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00425
epssPercentile: 0.34039
ingestedAt: '2026-09-05T14:40:37.524Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: fix UAF in bt_accept_dequeue()

bt_accept_get() takes a temporary reference before dropping the accept
queue lock. bt_accept_dequeue() currently drops that reference before
bt_accept_unlink(), leaving only the queue reference.

bt_accept_unlink() drops the queue reference. The subsequent
sock_hold() therefore accesses freed memory if it was the final
reference, as observed by KASAN during listening L2CAP socket cleanup.

Retain the temporary queue-walk reference through unlink and hand it to
the caller on success. Drop it explicitly on the closed and
not-yet-connected paths.

## Affected

- `linux_kernel >= 5.10.259, < 5.10.261`
- `linux_kernel >= 5.15.210, < 5.15.212`
- `linux_kernel >= 6.1.175, < 6.1.178`
- `linux_kernel >= 6.6.142, < 6.6.145`
- `linux_kernel >= 6.12.92, < 6.12.96`
- `linux_kernel >= 6.18.34, < 6.18.39`
- `linux_kernel >= 7.0.11, < 7.1`
- `linux_kernel >= 7.1.1, < 7.1.4`
- `linux_kernel = 7.1`
- `linux_kernel = 7.2`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.1.4`