ESP-IDF: Stack-Based Out-of-Bounds Write in Thread Border Router ND6 Option Parsing

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-113782
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-04 19:17:18 UTC
Updated2026-11-04 19:17:18 UTC
DescriptionESP-IDF is the Espressif Internet of Things (IOT) Development Framework. From 5.2.0 until 5.2.8, 5.3.6, 5.4.5, 5.5.5, and 6.0.3, the OpenThread Border Router Neighbor Discovery packet handler trusts an attacker-controlled ICMPv6 option length while copying into a fixed stack buffer. A host on the same infrastructure link as the Border Router can send a crafted ICMPv6 Router Advertisement to its infrastructure interface whose oversized length causes an out-of-bounds write into adjacent stack memory. Firmware is affected only when CONFIG_OPENTHREAD_BORDER_ROUTER=y; Thread end devices, routers, and RCP firmware without the Border Router feature are unaffected. Exploitation requires no authentication or user interaction and can crash or reboot the device or corrupt adjacent stack state. This issue is fixed in versions 5.2.8, 5.3.6, 5.5.5, and 6.0.3 and is scheduled to be fixed in version 5.4.5.

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-121 | CWE-121 CWE-121: Stack-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 >= 5.2.0, < 5.2.8 Not specified
CNA Espressif Esp-idf affected >= 5.3.0, < 5.3.6 Not specified
CNA Espressif Esp-idf affected >= 5.4.0, < 5.4.5 Not specified
CNA Espressif Esp-idf affected >= 5.5.0, < 5.5.5 Not specified
CNA Espressif Esp-idf affected >= 6.0.0, < 6.0.3 Not specified

References

ReferenceSourceLinkTags
github.com/espressif/esp-idf/commit/c22480ba07fc1de454a63d42275c764d95c7... [email protected] github.com
github.com/espressif/esp-idf/commit/b6860b2db50406adf0aaebd75f2e9fe64cc8... [email protected] github.com
github.com/espressif/esp-idf/commit/4068c4e7d061b3e2d6096734509feadc1459... [email protected] github.com
github.com/espressif/esp-idf/commit/f9bb1be59081ccef03a1b4b1fab9a225f28b... [email protected] github.com
github.com/espressif/esp-idf/security/advisories/GHSA-c26h-gm53-qg83 [email protected] github.com
github.com/espressif/esp-idf/commit/e18d27e480aec2b282898f4afc22b0f738ea... [email protected] github.com
github.com/espressif/esp-idf/commit/c828d0d709f1c46fa2b9e1ed3ce9d8dc4b29... [email protected] github.com
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