Out-of-bounds Read in Espressif Esp-Idf
CVE-2026-45329
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (5.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Espressif Esp-Idf — versions 5.5.4, = 5.5.4, 6.0
Weakness classification (CWE)
References
- github.com/espressif/esp-idf/commit/145ba4c42dc8283054cfde9a1c3470db7399192f (Patch)
- github.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406b (Patch)
- github.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6 (Patch)
- github.com/espressif/esp-idf/security/advisories/GHSA-w82j-7q63-7pqm (Patch, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45329?
- CVE-2026-45329 is a high-severity vulnerability in Espressif Esp-Idf, classified under Improper Input Validation. CVSS score: 7.1/10. Published 2026-06-10.
- How severe is CVE-2026-45329?
- High severity. CVSS v3 base score is 7.1 out of 10.