---
id: CVE-2026-81508
title: ESF-IDF is the Espressif Internet of Things (IOT) Development Framework
summary: >-
  ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In
  5.5.5, 6.0.1, and 6.1, the BlueDroid A2DP sink function
  btc_a2dp_sink_handle_inc_media() reads a timestamp field from the received
  media buffer before validating…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-125
vendor: espressif
product: esp-idf
affected:
  - esp-idf = 6.1
  - esp-idf = 6.0.1
  - esp-idf = 5.5.5
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:17:26.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81508'
references:
  - url: >-
      https://github.com/espressif/esp-idf/commit/0d118139ff8b7aa87b656c2f4a6421ecaa1f5939
    label: security-advisories@github.com
  - url: >-
      https://github.com/espressif/esp-idf/commit/6cb20db4dfeee81314d0c55acb82f3f0e7679abe
    label: security-advisories@github.com
  - url: >-
      https://github.com/espressif/esp-idf/commit/85d56bcd266117e0fe6a6b75511c8e122fda29ad
    label: security-advisories@github.com
  - url: >-
      https://github.com/espressif/esp-idf/commit/ca55d63de82e41e2c672bfd2b707fc80911f30ce
    label: security-advisories@github.com
  - url: >-
      https://github.com/espressif/esp-idf/security/advisories/GHSA-xcpr-5mqp-9qvv
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-24T18:06:01.831759Z'
ingestedAt: '2026-09-24T18:49:36.711Z'
---

## Overview

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In 5.5.5, 6.0.1, and 6.1, the BlueDroid A2DP sink function btc_a2dp_sink_handle_inc_media() reads a timestamp field from the received media buffer before validating that the packet layout contains the field. A paired BR/EDR audio source within radio range can send a malformed A2DP media packet to a build with BlueDroid Classic Bluetooth and A2DP sink support enabled, causing an out-of-bounds read into adjacent heap memory and limited disclosure of heap contents. Arbitrary memory disclosure and code execution are not established.

## Remediation

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