Missing mutex synchronization in AudioBuffer::freeSpace() in schreibfaul1 ESP32-audioI2S 3.4.5 creates a race condition between concurrent tasks. The function calculates available buffer space without protecting shared read/write pointers, returning an incorrectly large value. Trusting this value leads to heap out-of-bounds write, memory corruption, device crash, and arbitrary code execution.
History

Thu, 30 Jul 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Schreibfaul1
Schreibfaul1 esp32-audioi2s
Vendors & Products Schreibfaul1
Schreibfaul1 esp32-audioi2s

Thu, 30 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-362
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 28 Jul 2026 16:15:00 +0000

Type Values Removed Values Added
Description Missing mutex synchronization in AudioBuffer::freeSpace() in schreibfaul1 ESP32-audioI2S 3.4.5 creates a race condition between concurrent tasks. The function calculates available buffer space without protecting shared read/write pointers, returning an incorrectly large value. Trusting this value leads to heap out-of-bounds write, memory corruption, device crash, and arbitrary code execution.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-07-30T17:40:39.349Z

Reserved: 2026-06-07T00:00:00.000Z

Link: CVE-2026-51261

cve-icon Vulnrichment

Updated: 2026-07-30T16:03:23.892Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-30T20:27:16Z