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CVE-2026-81508— ESF-IDF: Heap Out-of-Bounds Read in Bluedroid A2DP Sink Media Packet Processing

Quick assessment

Affected
espressif esp-idf
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ESF-IDF 是乐鑫物联网（IoT）开发框架。在版本 5.5.5、6.0.1 和 6.1 中，BlueDroid 的 A2DP 接收端函数 btc_a2dp_sink_handle_inc_media() 在验证数据包布局是否包含时间戳字段之前，就读取了从接收到的媒体缓冲区中的该时间戳字段。处于无线信号范围内的已配对 BR/EDR 音频源可以向启用了 BlueDroid 经典蓝牙和 A2DP 接收端支持的设备发送畸形的 A2DP 媒体数据包，从而导致对相邻堆内存的越界读取，并有限地泄露堆内存内容。目前尚未发现可任

CVSS 4.3 · Medium EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1213 · Data from Information Repositories

Affected Version Matrix 3

VendorProduct Version RangeStatus
espressif esp-idf = 6.1 affected
= 6.0.1 affected
= 5.5.5 affected
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I. Basic Information for CVE-2026-81508

Vulnerability Information
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Vulnerability Title
ESF-IDF: Heap Out-of-Bounds Read in Bluedroid A2DP Sink Media Packet Processing
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
espressif esp-idf = 6.1 -

II. Public POCs for CVE-2026-81508

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III. Intelligence Information for CVE-2026-81508

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Patches & Fixes for CVE-2026-81508 (4)

Vendor Advisories for CVE-2026-81508 (1)

IV. Related Vulnerabilities

Same product: esp-idf
Same vendor: espressif
Same weakness: CWE-125

V. Comments for CVE-2026-81508

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