schreibfaul1 ESP32-audioI2S 3.4.5 Audio.cpp integer overflow

Summaryinfo

A vulnerability labeled as critical has been found in schreibfaul1 ESP32-audioI2S 3.4.5. Affected by this issue is some unknown functionality of the file Audio.cpp. Executing a manipulation can lead to integer overflow. This vulnerability is registered as CVE-2026-51259. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in schreibfaul1 ESP32-audioI2S 3.4.5 and classified as critical. This vulnerability affects an unknown part of the file Audio.cpp. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Unchecked unsigned integer overflow in buffer size calculation in schreibfaul1 ESP32-audioI2S 3.4.5 leads to undersized PSRAM buffer allocation. Subsequent normal audio buffer read and write operations cause heap out-of-bounds access, memory corruption, denial of service, and potential code execution.

The advisory is available at github.com. This vulnerability was named CVE-2026-51259 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. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of 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.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• schreibfaul1

Name

• ESP32-audioI2S

Version

• 3.4.5

Website

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

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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