---
id: CVE-2026-68391
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds

  Dereferencing RCU-protected pointers outside critical sections is
  invalid and may lead to UAF
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds

  Dereferencing RCU-protected pointers outside critical sections is
  invalid and may lead to UAF.  Use o…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7b445e220db9a2c58be5d09bbbd322abf1b1452a <
    84674dd1d3192ecb050827d3148642609c0c9dbb
  - >-
    Linux >= 7b445e220db9a2c58be5d09bbbd322abf1b1452a <
    b56f2ecafc08f372bf0529f9c4f3f429cb1702dc
  - >-
    Linux >= 7b445e220db9a2c58be5d09bbbd322abf1b1452a <
    f915e74b6f18293d1d69a2a3305ef321ff7c0172
  - >-
    Linux >= 7b445e220db9a2c58be5d09bbbd322abf1b1452a <
    d5b3b484b62bb0f4542e7622789d28871626cdf0
  - >-
    Linux >= 7b445e220db9a2c58be5d09bbbd322abf1b1452a <
    ecdcb55ea1c01dda074406f38058785a69526734
  - >-
    Linux >= 7b445e220db9a2c58be5d09bbbd322abf1b1452a <
    da55f570191d5d72f10c607a7043b947eb05ea46
  - Linux 6.0
published: '2026-08-10'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T11:17:36.830'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-68391'
references:
  - url: 'https://git.kernel.org/stable/c/84674dd1d3192ecb050827d3148642609c0c9dbb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b56f2ecafc08f372bf0529f9c4f3f429cb1702dc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d5b3b484b62bb0f4542e7622789d28871626cdf0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/da55f570191d5d72f10c607a7043b947eb05ea46'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ecdcb55ea1c01dda074406f38058785a69526734'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f915e74b6f18293d1d69a2a3305ef321ff7c0172'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00129
epssPercentile: 0.02126
ingestedAt: '2026-10-03T11:43:42.117Z'
---

## Overview

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

Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds

Dereferencing RCU-protected pointers outside critical sections is
invalid and may lead to UAF.  Use of hci_conn in hci_sync callbacks also
needs to hold refcount to avoid UAF.

Take appropriate locks for hci_conn lookups, and take refcount for
hci_conn pointers stored in mgmt_pending_cmd so that the pointer stays
valid.

When accessing conn->state, ensure hdev->lock is held to avoid data
race.

## Remediation

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