Quick answers
- Is CVE-2026-51244 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-51244 being exploited in the wild.
- How severe is CVE-2026-51244?
- High severity, with a CVSS score of 7.5, published 27 July 2026.
- Which products and versions are affected?
- Schreibfaul1 ESP32-audioI2S 3.4.5.
- Is there a fix for CVE-2026-51244?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-51244 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-51244?
- Check whether you run Schreibfaul1 ESP32-audioI2S at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap buffer overflow exists in the UnpackFrameHeader() function within the MP3 decoder of ESP32-audioI2S version 3.4.5. The vulnerability is caused by the lack of boundary validation for m_MPEGVersion and srIdx values parsed directly from the MP3 bitstream. These unvalidated indices are used to access the static sfBandTable, resulting in out-of-bounds memory access. An attacker can provide a malicious MP3 file that, when processed, leads to corrupted pointers and subsequent out-of-bounds heap writes, potentially allowing for arbitrary code execution or a denial-of-service (DoS) on the ESP32 hardware.
Affected products
- schreibfaul1 ESP32-audioI2S 3.4.5
Timeline
- 2026-07-27: advisory: CVE published by NVD/MITRE