CVE-2026-45542 (GCVE-0-2026-45542)
Vulnerability from cvelistv5 – Published: 2026-06-10 00:34 – Updated: 2026-06-10 15:16
VLAI
EPSS
VEX
Title
ESF-IDF: Heap buffer overflow in protocomm Security2 over Bluetooth
Summary
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.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/espressif/esp-idf/security/adv… | x_refsource_CONFIRM |
| https://github.com/espressif/esp-idf/commit/0ea58… | x_refsource_MISC |
| https://github.com/espressif/esp-idf/commit/56c3e… | x_refsource_MISC |
| https://github.com/espressif/esp-idf/commit/71eb2… | x_refsource_MISC |
| https://github.com/espressif/esp-idf/commit/9b4ca… | x_refsource_MISC |
| https://github.com/espressif/esp-idf/commit/a2f45… | x_refsource_MISC |
| https://github.com/espressif/esp-idf/commit/f5d24… | x_refsource_MISC |
Impacted products
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"id": "CVE-2026-45542",
"initial_release_date": "2026-01-01T00:00:00+00:00",
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"source": "Red Hat CSAF VEX",
"status": "final",
"title": "ESF-IDF: Heap buffer overflow in protocomm Security2 over Bluetooth",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45542.json",
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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