ESF-IDF: Heap buffer overflow in protocomm Security2 over Bluetooth

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Summary

CVECVE-2026-45542
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-10 02:16:33 UTC
Updated2026-06-10 02:16:33 UTC
DescriptionESF-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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Problem Types: CWE-122 | CWE-122 CWE-122: Heap-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Espressif Esp-idf affected = 5.2.6 Not specified
CNA Espressif Esp-idf affected = 5.3.5 Not specified
CNA Espressif Esp-idf affected = 5.4.4 Not specified
CNA Espressif Esp-idf affected = 5.5.4 Not specified
CNA Espressif Esp-idf affected = 6.0 Not specified

References

ReferenceSourceLinkTags
github.com/espressif/esp-idf/commit/a2f4554f10ba075c98cbc67464db096ba324... [email protected] github.com
github.com/espressif/esp-idf/commit/56c3e385611e63162d0f2f8504ac4ae2ccfc... [email protected] github.com
github.com/espressif/esp-idf/security/advisories/GHSA-9r76-858f-v6jh [email protected] github.com
github.com/espressif/esp-idf/commit/9b4cacf9cbc69379972de6a2247fcf5af924... [email protected] github.com
github.com/espressif/esp-idf/commit/71eb2dbe6aaef830719ecac8edf409e2992b... [email protected] github.com
github.com/espressif/esp-idf/commit/f5d24a7e919bc5f447091479656b86da6762... [email protected] github.com
github.com/espressif/esp-idf/commit/0ea58d79845ad674d0358d5de246015a68c4... [email protected] github.com
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