---
id: CVE-2026-113780
title: 'ESF-IDF: Unvalidated Stack Pointer at the ESP-TEE Privilege-Switch Boundary'
summary: >-
  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 throu…
severity: critical
cvss: 9.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-787
  - CWE-822
vendor: espressif
product: esp-idf
affected:
  - esp-idf < 5.5.6
  - 'esp-idf >= 6.0.0, < 6.0.4'
  - 'esp-idf >= 6.1.0, < 6.1.1'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-05T19:10:46.416008Z'
published: '2026-11-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T19:10:59.124Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113780'
references:
  - url: >-
      https://github.com/espressif/esp-idf/security/advisories/GHSA-49x8-xqjg-2pjg
    label: >-
      https://github.com/espressif/esp-idf/security/advisories/GHSA-49x8-xqjg-2pjg
  - url: >-
      https://github.com/espressif/esp-idf/commit/773761abb893d43d0a5b8b75ec0a1c2cf0287d53
    label: >-
      https://github.com/espressif/esp-idf/commit/773761abb893d43d0a5b8b75ec0a1c2cf0287d53
  - url: >-
      https://github.com/espressif/esp-idf/commit/acb7d996b07293abf591b93f4aaffa04ae6732d9
    label: >-
      https://github.com/espressif/esp-idf/commit/acb7d996b07293abf591b93f4aaffa04ae6732d9
  - url: >-
      https://github.com/espressif/esp-idf/commit/b85a7b0e1449ac9aec30a0c3e3b6515725556fd1
    label: >-
      https://github.com/espressif/esp-idf/commit/b85a7b0e1449ac9aec30a0c3e3b6515725556fd1
  - url: >-
      https://github.com/espressif/esp-idf/commit/dabd37fae8d2a7b1cc71f48fce824b0b9d909a07
    label: >-
      https://github.com/espressif/esp-idf/commit/dabd37fae8d2a7b1cc71f48fce824b0b9d909a07
  - url: 'https://github.com/espressif/esp-idf/releases/tag/v5.5.6'
    label: 'https://github.com/espressif/esp-idf/releases/tag/v5.5.6'
tags:
  - cve.org
epss: 0.00141
epssPercentile: 0.03483
ingestedAt: '2026-11-05T22:38:31.514Z'
---

## Overview

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.

## Affected

- `esp-idf < 5.5.6`
- `esp-idf >= 6.0.0, < 6.0.4`
- `esp-idf >= 6.1.0, < 6.1.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.