schreibfaul1 ESP32-audioI2S 3.4.5 src/Audio.cpp dismantle_host/clone_from heap-based overflow

Summaryinfo

A vulnerability labeled as critical has been found in schreibfaul1 ESP32-audioI2S 3.4.5. This issue affects the function dismantle_host/clone_from of the file src/Audio.cpp. The manipulation results in heap-based overflow. This vulnerability is cataloged as CVE-2026-51268. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in schreibfaul1 ESP32-audioI2S 3.4.5. Affected is the function dismantle_host/clone_from of the file src/Audio.cpp. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

schreibfaul1 ESP32-audioI2S 3.4.5 has a heap-based buffer overflow vulnerability in the host parsing logic. The dismantle_host() function parses untrusted host and URL input, and subsequent code uses clone_from() to copy parsed host, request host, extension and query_string segments into fixed heap buffers without boundary checking.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-51268 since 06/07/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/28/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• schreibfaul1

Name

• ESP32-audioI2S

Version

• 3.4.5

Website

• Product: https://github.com/schreibfaul1/ESP32-audioI2S/

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CPE 2.2info

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