CVE-2026-51259 | Unchecked unsigned integer overflow in buffer size calculati… | CVSS 9.8 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2026-51259
State: PUBLISHED
Assigner: mitre
Reserved: 2026-06-07 00:00 UTC
Published: 2026-07-28 00:00 UTC
Last updated: 2026-07-28 18:22 UTC
Primary CWE: CWE-122
CWE-122 Heap-based Buffer Overflow
Vendor / Product: n/a / n/a
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
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
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (2)