CVE-2026-45329
HighCVSS 7.1Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
In versions 5.5.4 and 6.0 of the ESF-IDF framework, there is a vulnerability where some caller-supplied pointer arguments are not properly validated. This allows access to TEE-exclusive memory, potentially leading to the disclosure of sensitive data.
Risk Assessment
Organizations may be at risk of leaking sensitive data from TEE memory, which could lead to serious security breaches and loss of user trust.
Recommendation
It is recommended to upgrade to versions 5.5.5 or 6.0.1 to patch this vulnerability and secure the system against potential attacks.
Original NVD description (English source)
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.4 and 6.0, several ESP-TEE secure-service wrappers in esp_secure_services.c and esp_secure_services_iram.c validated only some of the caller-supplied pointer arguments, leaving input pointer arguments unchecked. Because the underlying TEE-protected hardware peripherals (e.g., ECC, SHA, SPI) run in RISC-V machine mode (M-mode) with full address-space access, a caller could supply pointers into TEE-exclusive memory as inputs, causing the peripheral to read TEE memory and return results derived from it to the REE. Depending on the wrapper, the result contains raw bytes from TEE memory, a computed function of TEE memory recoverable through repeated calls, or a single bit per call that forms an oracle for incremental disclosure of TEE-resident sensitive data. This issue has been patched in versions 5.5.5 and 6.0.1.