CVE-2026-45542: CWE-122: Heap-based Buffer Overflow in espressif esp-idf
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.
AI Analysis
Technical Summary
The Espressif Internet of Things Development Framework (esp-idf) versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0 contain a heap-based buffer overflow in the protocomm component's Security Scheme 2 (SRP6a) session-setup path. Specifically, the handle_session_command0() function in security2.c copies a client-supplied protobuf username field into a buffer whose size is derived from a narrower destination type without proper length validation. This truncation-versus-copy mismatch leads to heap corruption when oversized input is provided. The issue is addressed in patched versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1.
Potential Impact
Exploitation of this vulnerability can lead to heap corruption resulting in denial of service or potentially other impacts related to memory corruption. The CVSS score of 7.1 indicates a high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to integrity and availability.
Mitigation Recommendations
Upgrade esp-idf to one of the patched versions: 5.2.7, 5.3.6, 5.4.5, 5.5.5, or 6.0.1. No other mitigation or workaround is indicated. Patch status is confirmed by the vendor advisory information embedded in the description.
CVE-2026-45542: CWE-122: Heap-based Buffer Overflow in espressif esp-idf
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 v3.1
Score 7.1high
Affected software
pkg:github/espressif/esp-idfRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Espressif Internet of Things Development Framework (esp-idf) versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0 contain a heap-based buffer overflow in the protocomm component's Security Scheme 2 (SRP6a) session-setup path. Specifically, the handle_session_command0() function in security2.c copies a client-supplied protobuf username field into a buffer whose size is derived from a narrower destination type without proper length validation. This truncation-versus-copy mismatch leads to heap corruption when oversized input is provided. The issue is addressed in patched versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1.
Potential Impact
Exploitation of this vulnerability can lead to heap corruption resulting in denial of service or potentially other impacts related to memory corruption. The CVSS score of 7.1 indicates a high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to integrity and availability.
Mitigation Recommendations
Upgrade esp-idf to one of the patched versions: 5.2.7, 5.3.6, 5.4.5, 5.5.5, or 6.0.1. No other mitigation or workaround is indicated. Patch status is confirmed by the vendor advisory information embedded in the description.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-12T17:48:47.879Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a28c09e8dd33fbd85c1ae74
Added to database: 06/10/2026, 01:40:46 UTC
Last enriched: 06/17/2026, 08:55:50 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 62
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