PT-2026-48353 · Espressif · Esp-Idf

Published 2026-06-10 · Updated 2026-06-10 · CVE-2026-45542

Mitre

CVSS v3.1

7.1

High

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a heap buffer overflow exists in the Security Scheme 2 (SRP6a) session-setup path of the protocomm component. The first-phase handler (handle session command0() in components/protocomm/src/security/security2.c) trusts the length of a client-supplied protobuf field for the SRP6a username and copies it into a buffer whose size is derived from a narrower destination type. The resulting truncation-versus-copy asymmetry corrupts the heap when an oversized value is supplied. This issue has been patched in versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1.

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-45542

Affected Products

Esp-Idf

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-45542 · Security Note
• https://github.com/espressif/esp-idf/commit/f5d24a7e919bc5f447091479656b86da6762a103 · Note
• https://github.com/espressif/esp-idf/commit/0ea58d79845ad674d0358d5de246015a68c4cb4f · Note
• https://github.com/espressif/esp-idf/commit/a2f4554f10ba075c98cbc67464db096ba32497cf · Note
• https://github.com/espressif/esp-idf/commit/56c3e385611e63162d0f2f8504ac4ae2ccfccef0 · Note
• https://github.com/espressif/esp-idf/commit/71eb2dbe6aaef830719ecac8edf409e2992b64b2 · Note
• https://github.com/espressif/esp-idf/commit/9b4cacf9cbc69379972de6a2247fcf5af9240961 · Note
• https://github.com/espressif/esp-idf/security/advisories/GHSA-9r76-858f-v6jh · Note