CVE-2026-45329 ESF-IDF: Out-of-Bounds Read in ESP-TEE Secure Service Wrappers
Attackers can read TEE memory via unchecked pointers in ESP-TEE wrappers, disclosing sensitive data from secure hardware peripherals.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-45329?
CVE-2026-45329 is a high-severity vulnerability in espressif esp-idf, published on 10 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-45329?
It affects 1 product.
Products include Espressif Esp-Idf.
How do I fix CVE-2026-45329?
No fix has been published for CVE-2026-45329 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-45329 being exploited?
There is no known exploitation of CVE-2026-45329 in the wild and no public exploit code.
Other vulnerabilities in espressif esp-idf
Sources
Also known as GHSA-w82j-7q63-7pqm.