---
id: CVE-2026-80692
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks

  There is theoretical UAF if the conn is freed while the hci_sync task
  is running.

  Hold refcount …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks

  There is theoretical UAF if the conn is freed while the hci_sync task
  is running.

  Hold refcount …
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
affected:
  - >-
    Linux >= 881559af5f5c545f6828e7c74d79813eb886d523 <
    a4de6fc95b2f36967fc247ae51cad2171194f7cd
  - >-
    Linux >= 881559af5f5c545f6828e7c74d79813eb886d523 <
    9a77f296aff4b2ca5f2928ab3a3220c82d8b4074
  - >-
    Linux >= 881559af5f5c545f6828e7c74d79813eb886d523 <
    2f5d635ad5906b0235bc0c870e8beba3116e1e98
  - Linux d948e1ffa1d40240d5c81af6dcbcb87b39cb8d3c
  - Linux 5dd0bd277a0a936708a33ecc447dce77a08cbde6
  - Linux >= 6.6.51 < 6.7
  - Linux >= 6.8.9 < 6.9
  - Linux 6.9
published: '2026-08-28'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T11:17:51.553'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80692'
references:
  - url: 'https://git.kernel.org/stable/c/2f5d635ad5906b0235bc0c870e8beba3116e1e98'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9a77f296aff4b2ca5f2928ab3a3220c82d8b4074'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a4de6fc95b2f36967fc247ae51cad2171194f7cd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.0034
epssPercentile: 0.25837
ingestedAt: '2026-10-15T11:00:41.663Z'
---

## Overview

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

Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks

There is theoretical UAF if the conn is freed while the hci_sync task
is running.

Hold refcount to avoid that.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.