CVE-2026-45328: ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.4 and 6.0, the esptee component exposes secure-service wrappers in espsecureservices.c and espsecureservicesiram.c that bridge calls from the user application (i.e. the REE) to TEE-protected hardware peripherals (AES, SHA, ECC, HMAC, SPI, MMU, WDT) and to the security feature like attestation, OTA updates, secure storage. This issue has been patched in versions 5.5.5 and 6.0.1.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ESF-IDF (esp_tee)to a version that resolves this vulnerability.Fixed in 5.5.5 - Upgrade
Upgrade
ESF-IDF (esp_tee)to a version that resolves this vulnerability.Fixed in 6.0.1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-45328?
CVE-2026-45328 has a critical severity rating of 9.3.
How do I fix CVE-2026-45328?
Fixing CVE-2026-45328 involves upgrading to a patched version of the Espressif ESP-IDF framework.
What causes CVE-2026-45328?
CVE-2026-45328 is caused by an out-of-bounds write vulnerability in the esp_tee component of the Espressif ESP-IDF.
Who is affected by CVE-2026-45328?
CVE-2026-45328 affects users of Espressif ESP-IDF versions 5.5.4 and 6.0.
What are the potential impacts of CVE-2026-45328?
The potential impacts of CVE-2026-45328 include unauthorized access and manipulation of sensitive hardware peripherals.