No VulnCrest analysis published for this CVE yet. Below is the original CNA/NVD description, unmodified.
Description
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. From 5.5.5 until 5.5.6, 6.0.4, and 6.1.1, the esp_tee trap entry in esp_tee_vectors_plic.S and esp_tee_vectors_clic.S saves a caller-controlled register frame through the REE-supplied stack pointer before switching to the trusted TEE stack or validating the pointer. A local unprivileged REE application can direct this machine-mode write into TEE-exclusive memory on ESP32-C5, ESP32-C6, ESP32-C61, and ESP32-H2 devices, breaking the REE/TEE isolation boundary and potentially corrupting TEE control-flow data for code execution, denial of service, or system crashes. Both secure-service ecall and interrupt entry paths contain the vulnerable ordering. This issue is fixed in version 5.5.6 and is scheduled to be fixed in versions 6.0.4 and 6.1.1.
Exploits & detection
No public PoC or detection template found yet.
Timeline
- Published: 04 Nov 2026
- Last modified upstream: 04 Nov 2026
Sources & licenses
- CVE / CVSS / CWE
- NVD record ↗ (unmodified). This product uses the NVD API but is not endorsed or certified by the NVD. CVE® © The MITRE Corporation.
- Exploitation
- CISA KEV (CC0) · EPSS by FIRST.org
- References used for the analysis
- https://github.com/espressif/esp-idf/commit/773761abb893d43d0a5b8b75ec0a1c2cf0287d53
- https://github.com/espressif/esp-idf/commit/acb7d996b07293abf591b93f4aaffa04ae6732d9
- https://github.com/espressif/esp-idf/commit/b85a7b0e1449ac9aec30a0c3e3b6515725556fd1
- https://github.com/espressif/esp-idf/commit/dabd37fae8d2a7b1cc71f48fce824b0b9d909a07
- https://github.com/espressif/esp-idf/releases/tag/v5.5.6
- https://github.com/espressif/esp-idf/security/advisories/GHSA-49x8-xqjg-2pjg
- Analysis, summary and remediation
- © VulnCrest