CVE-2026-45542

Vulnerability Description

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.

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• https://github.com/espressif/esp-idf/commit/0ea58d79845ad674d0358d5de246015a68c4Patch
• https://github.com/espressif/esp-idf/commit/56c3e385611e63162d0f2f8504ac4ae2ccfcPatch
• https://github.com/espressif/esp-idf/commit/71eb2dbe6aaef830719ecac8edf409e2992bPatch
• https://github.com/espressif/esp-idf/commit/9b4cacf9cbc69379972de6a2247fcf5af924Patch
• https://github.com/espressif/esp-idf/commit/a2f4554f10ba075c98cbc67464db096ba324Patch
• https://github.com/espressif/esp-idf/commit/f5d24a7e919bc5f447091479656b86da6762Patch
• https://github.com/espressif/esp-idf/security/advisories/GHSA-9r76-858f-v6jhMitigationPatchVendor Advisory