---
id: CVE-2026-72334
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: ISO: fix malformed ISO_END/CONT handling

  Core specification (Part C vol 4 sec 5.4.5) does not exclude empty
  ISO_CONT, ISO_END packets
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: ISO: fix malformed ISO_END/CONT handling

  Core specification (Part C vol 4 sec 5.4.5) does not exclude empty
  ISO_CONT, ISO_END packets.  We currently reject …
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 >= ccf74f2390d60a2f9a75ef496d2564abb478f46a <
    49aeb54e3c912ef785311264a51ab9f3698e421b
  - >-
    Linux >= ccf74f2390d60a2f9a75ef496d2564abb478f46a <
    5e53e285f8c989662e34d4938c728a94226bff34
  - >-
    Linux >= ccf74f2390d60a2f9a75ef496d2564abb478f46a <
    990e65eb9387c4ddfa7f68782b6644c2c35d489f
  - >-
    Linux >= ccf74f2390d60a2f9a75ef496d2564abb478f46a <
    e054c1a6ae7310d2815778fddb87da616e11c255
  - Linux 6.0
published: '2026-08-15'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T14:17:17.147'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72334'
references:
  - url: 'https://git.kernel.org/stable/c/49aeb54e3c912ef785311264a51ab9f3698e421b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5e53e285f8c989662e34d4938c728a94226bff34'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/990e65eb9387c4ddfa7f68782b6644c2c35d489f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e054c1a6ae7310d2815778fddb87da616e11c255'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00379
epssPercentile: 0.2919
ingestedAt: '2026-09-21T13:37:22.844Z'
---

## Overview

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

Bluetooth: ISO: fix malformed ISO_END/CONT handling

Core specification (Part C vol 4 sec 5.4.5) does not exclude empty
ISO_CONT, ISO_END packets.  We currently reject them if they are last.

If controller sends malformed sequence

    ISO_START -> rx_len = 4, ISO_CONT skb->len 4, ISO_START

that ends payload in ISO_CONT, we leak conn->rx_skb. If controller sends
too long ISO_END, we panic on skb_put. If controller sends too short
ISO_END we accept it.

Fix by marking unfinished ISO_START via conn->rx_skb != NULL.  Check
skb->len properly before skb_put.  Combine the ISO_CONT/END code paths
as they require the same initial checks. Reject too short ISO_END
packets.

## Remediation

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