---
id: CVE-2026-80764
title: 'kernel: Bluetooth: hci_event: fix LE list UAF on reset (CVE-2026-80764)'
summary: >-
  A flaw was found in the Linux kernel's Bluetooth subsystem. A local user could
  exploit a use-after-free vulnerability in the `hci_event` component. This
  occurs when the `hci_cc_reset()` function clears Bluetooth Low Energy (LE)
  lists witho…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-416
  - CWE-825
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-04'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T23:59:57+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80764.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80764.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80764'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2528558'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80764'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80764'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80764.mbox
  - url: 'https://kernelcve.org/list/?q=CVE-2026-80764'
  - url: 'https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed'
  - url: 'https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c'
  - url: 'https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621'
  - url: 'https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93'
  - url: 'https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6'
  - url: 'https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35'
  - url: 'https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00173
epssPercentile: 0.06617
ingestedAt: '2026-10-19T10:20:54.952Z'
---

## Overview

A flaw was found in the Linux kernel's Bluetooth subsystem. A local user could exploit a use-after-free vulnerability in the `hci_event` component. This occurs when the `hci_cc_reset()` function clears Bluetooth Low Energy (LE) lists without proper locking, allowing a debugfs reader to access freed memory. Successful exploitation could lead to memory corruption, potentially causing system instability or a denial of service.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80764.json)

**kernel: Bluetooth: hci_event: fix LE list UAF on reset** — rated Moderate by Red Hat. Released 2026-09-04, updated 2026-10-25.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 7

## Remediation

Out of support scope

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.