CVE-2026-45542
Last modified
CVE-2026-45542 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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. EPSS estimates a 0.33% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Espressif | Esp-Idf | 5.2.6 |
| Espressif | Esp-Idf | 5.3.5 |
| Espressif | Esp-Idf | 5.4.4 |
| Espressif | Esp-Idf | 5.5.4 |
| Espressif | Esp-Idf | 6.0 |
References
- https://github.com/espressif/esp-idf/security/advisories/GHSA-9r76-858f-v6jhMitigation, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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