---
id: CVE-2026-80760
title: >-
  kernel: Bluetooth: MGMT: reject HCI_CMD_SYNC params_len above 255
  (CVE-2026-80760)
summary: >-
  A flaw was found in the Linux kernel's Bluetooth Management (MGMT) component.
  The `mgmt_hci_cmd_sync()` function incorrectly handles the `params_len` field,
  allowing a value greater than 255 to be processed. This mismatch between the
  decla…
severity: low
cvss: 2.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L'
cvssSource: vendor
cwe: CWE-20
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-04'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T00:48:35+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80760.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80760.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80760'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2528596'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80760'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80760'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80760.mbox
  - url: 'https://kernelcve.org/list/?q=CVE-2026-80760'
  - url: 'https://git.kernel.org/stable/c/b7d9edcf9fe6e9ec3a2e80ef9e8d44ef9b4f2894'
  - url: 'https://git.kernel.org/stable/c/0bd0195ce25737cbdd0eabc54319ee0ddf3a0ad2'
  - url: 'https://git.kernel.org/stable/c/6e1c44878aa3ee7336efeaf01414b030b0a5c273'
  - url: 'https://git.kernel.org/stable/c/5d95286b6d6e8f1d304da7522bfa6860fc017e48'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00209
epssPercentile: 0.10956
ingestedAt: '2026-10-19T10:20:54.950Z'
---

## Overview

A flaw was found in the Linux kernel's Bluetooth Management (MGMT) component. The `mgmt_hci_cmd_sync()` function incorrectly handles the `params_len` field, allowing a value greater than 255 to be processed. This mismatch between the declared parameter length and the actual appended data can cause the Bluetooth controller to misinterpret subsequent data as the start of a new packet, potentially leading to unexpected behavior or a denial of service.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80760.json)

**kernel: Bluetooth: MGMT: reject HCI_CMD_SYNC params_len above 255** — rated Moderate by Red Hat. Released 2026-09-04, updated 2026-10-26.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4

## Remediation

Fix deferred

Workarounds / mitigations:

- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.