by Kastro
Paper/Archive/CVE-2026-45328

CVE-2026-45328

espressif esp-idf — ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers

EPSS 0.1%CVSS 9.3
critical.is priorityof 100
28
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 2.3.023 × 200.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.4 and 6.0, the esp_tee component exposes secure-service wrappers in esp_secure_services.c and esp_secure_services_iram.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

ProductAffectedFixed inSource
esp-idf= 5.5.4–CNA
esp-idf= 6.0–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/espressif/esp-idf/security/advisories/GHSA-mmgp-73p4-92xprefgithub.com/espressif/esp-idf/commit/145ba4c42dc8283054cfde9a1c3470db7399192frefgithub.com/espressif/esp-idf/commit/440a5d1906502023f2a0fb0aecbdf0602d14acbfrefgithub.com/espressif/esp-idf/commit/764626a1b7c85b943d207da08a2f8f7d7f3def4drefgithub.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406brefgithub.com/espressif/esp-idf/commit/afd14ab113acd0ca369965404c99ac42e74d4fcdrefgithub.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6