---
id: CVE-2026-80721
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: ISO: ensure no dangling hcon references in iso_conn

  After iso_conn_del(), ISO sockets should not dereference the hcon any
  more
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: ISO: ensure no dangling hcon references in iso_conn

  After iso_conn_del(), ISO sockets should not dereference the hcon any
  more.  Currently, clearing iso_con…
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'
published: '2026-08-28'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80721'
references:
  - url: 'https://git.kernel.org/stable/c/aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cdce8af9291d8a1f8916c271de029bf558d9e8ec'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e941799c31f68e67ce0976efb38a79101f921b64'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00375
epssPercentile: 0.28746
ingestedAt: '2026-08-30T07:49:06.270Z'
---

## Overview

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

Bluetooth: ISO: ensure no dangling hcon references in iso_conn

After iso_conn_del(), ISO sockets should not dereference the hcon any
more.  Currently, clearing iso_conn::hcon relies on iso_conn_del()
releasing the last reference to the iso_conn.

Simplify this by explicitly clearing conn->hcon in iso_conn_del(), to
avoid more complex reasoning on races about who holds the last
reference.

## Remediation

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