schreibfaul1 ESP32-audioI2S 3.4.5 ID3 Tag Parsing src/Audio.cpp showID3Tag heap-based overflow

Summaryinfo

A vulnerability classified as critical has been found in schreibfaul1 ESP32-audioI2S 3.4.5. This affects the function showID3Tag of the file src/Audio.cpp of the component ID3 Tag Parsing. This manipulation causes heap-based overflow. This vulnerability is registered as CVE-2026-51273. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in schreibfaul1 ESP32-audioI2S 3.4.5 and classified as critical. Affected by this vulnerability is the function showID3Tag of the file src/Audio.cpp of the component ID3 Tag Parsing. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is 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(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In schreibfaul1 ESP32-audioI2S 3.4.5, a heap-based buffer overflow vulnerability exists in the ID3 tag parsing function showID3Tag() of the embedded audio streaming library. The program reads untrusted long ID3 tag value from malicious audio files and uses unbounded appendf() to write formatted strings into ps_ptr heap buffer without length validation. Successful exploitation allows attackers to execute arbitrary code, leak sensitive memory data, cause device crash, or escalate privileges via a crafted malicious audio file.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-51273 since 06/07/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (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.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• schreibfaul1

Name

• ESP32-audioI2S

Version

• 3.4.5

Website

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

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Entryinfo

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