---
id: CVE-2026-10641
title: >-
  Out-of-bounds write in Bluetooth HFP Hands-Free CIND indicator parsing
  (cind_handle_values)
summary: >-
  Zephyr's Bluetooth Classic Hands-Free Profile (HFP) Hands-Free role parser
  (subsys/bluetooth/host/classic/hfp_hf.c) contains an out-of-bounds write.
  During Service Level Connection setup the HF sends AT+CIND=? and parses the
  AG's +CIND: …
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: zephyrproject
product: zephyr
affected:
  - zephyr >= 1.7.0 < 4.3.1
  - zephyr >= 4.4.0 < 4.4.2
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-17T14:59:49.875821Z'
exploitAvailable: true
published: '2026-06-17'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:10:03.024Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-10641'
references:
  - url: >-
      https://github.com/zephyrproject-rtos/zephyr/commit/cf7693a8261ae363c9cf46cfd51005486637173e
    label: Fix commit
  - url: >-
      https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-wx5j-q6f2-59p3
    label: GHSA-wx5j-q6f2-59p3
tags:
  - cve.org
  - exploit-available
epss: 0.00282
epssPercentile: 0.19287
ingestedAt: '2026-10-15T22:48:25.566Z'
---

## Overview

Zephyr's Bluetooth Classic Hands-Free Profile (HFP) Hands-Free role parser (subsys/bluetooth/host/classic/hfp_hf.c) contains an out-of-bounds write. During Service Level Connection setup the HF sends AT+CIND=? and parses the AG's +CIND: response in cind_handle(), which assigns a per-entry counter index and calls cind_handle_values() for each list element. cind_handle_values() then wrote hf->ind_table[index] = i without verifying that index is within the 20-element int8_t ind_table[] array of struct bt_hfp_hf. Because the parser places no cap on the number of +CIND: list entries, a remote Attendant Gateway (a malicious, compromised, or spoofed peer the device connects to over Bluetooth) can send a response with more than 20 recognized indicator entries and drive index arbitrarily large, writing a small attacker-positioned value past the array into adjacent struct fields (feature masks, SDP/version state, the calls[] array, work/atomic bookkeeping) and potentially beyond the static connection pool slot. This yields memory corruption and at least denial of service of the Bluetooth host, triggered by a single malformed AT response with no user interaction. The sibling consumer ag_indicator_handle_values() already performed the equivalent bounds check; this commit adds the same index >= ARRAY_SIZE(hf->ind_table) guard to close the gap. Affects builds with CONFIG_BT_HFP_HF enabled; introduced with the original HFP HF CIND parser (~v1.7) and present through v4.4.0.

## Affected

- `zephyr >= 1.7.0 < 4.3.1`
- `zephyr >= 4.4.0 < 4.4.2`

## Remediation

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