Out-of-bounds read in ESP-IDF - CVE-2026-45329
Published: May 13, 2026
Vulnerability identifier: #VU131332
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45329
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Espressif Systems
Affected software:
ESP-IDF
ESP-IDF
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to out-of-bounds read in ESP-TEE secure-service wrappers in esp_secure_services.c and esp_secure_services_iram.c when processing caller-supplied pointer arguments. A remote attacker can supply pointers into TEE-exclusive memory to disclose sensitive information.
The issue crosses the REE/TEE isolation boundary and can expose TEE code and data, including cryptographic keys, through repeated calls that may return raw bytes, derived results, or oracle-like disclosure.
How to mitigate CVE-2026-45329
Install security update from vendor's website.