schreibfaul1 ESP32-audioI2S 3.4.5 APIC frame parsing src/Audio.cpp ID3v2 APIC frame parsing function heap-based overflow

Summaryinfo

A vulnerability labeled as critical has been found in schreibfaul1 ESP32-audioI2S 3.4.5. Affected is the function ID3v2 APIC frame parsing function of the file src/Audio.cpp of the component APIC frame parsing. Executing a manipulation can lead to heap-based overflow. This vulnerability is tracked as CVE-2026-51275. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in schreibfaul1 ESP32-audioI2S 3.4.5. This vulnerability affects the function ID3v2 APIC frame parsing function of the file src/Audio.cpp of the component APIC frame 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. CVE summarizes:

In schreibfaul1 ESP32-audioI2S 3.4.5, a heap-based buffer overflow in the ID3v2 APIC frame parsing function in audiolib allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a crafted MP3 file. The vulnerability exists due to missing length validation when processing the APIC frame size field, leading to an out-of-bounds memory write.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-51275 since 06/07/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. 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.

Once again VulDB remains the best 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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