CVE-2026-51271 | In schreibfaul1 ESP32-audioI2S 3.4.5, a heap-based buffer ov… | CVSS 9.6 CRITICAL

Description

In schreibfaul1 ESP32-audioI2S 3.4.5, a heap-based buffer overflow vulnerability exists in the WAV header parsing function read_WAV_Header(). The function reads untrusted chunk size and bytes-to-skip value directly from malicious WAV files without reasonable range restriction. Abnormally large bts and headerSize values lead to out-of-bounds heap memory read/write during header parsing, which can be exploited to execute arbitrary code, disclose sensitive information, cause denial of service or escalate privileges.

Metadata

CVE ID: CVE-2026-51271
State: PUBLISHED
Assigner: mitre
Reserved: 2026-06-07 00:00 UTC
Published: 2026-07-28 00:00 UTC
Last updated: 2026-07-28 17:58 UTC
Primary CWE: CWE-122
CWE-122 Heap-based Buffer Overflow
Vendor / Product: n/a / n/a
Sources: cve.org · NVD

Severity & Metrics

9.6 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
n/a	n/a	—	n/a

Weakness (CWE)

CWE	Source	Description
—	cna	n/a
CWE-122	adp	CWE-122 Heap-based Buffer Overflow

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.6	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References (2)