{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-41429", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-20T15:32:33.814Z", "datePublished": "2026-04-24T19:19:49.594Z", "dateUpdated": "2026-04-27T13:34:49.485Z"}, "containers": {"cna": {"title": "Improper validation of NBNS name_len in arduino-esp32 NetBIOS leads to memory corruption", "problemTypes": [{"descriptions": [{"cweId": "CWE-121", "lang": "en", "description": "CWE-121: Stack-based Buffer Overflow", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f"}], "affected": [{"vendor": "espressif", "product": "arduino-esp32", "versions": [{"version": "< 3.3.8", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-24T19:19:49.594Z"}, "descriptions": [{"lang": "en", "value": "arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontrollers. Prior to 3.3.8, there is a remotely reachable memory corruption issue in the NBNS packet handling path. When NetBIOS is enabled by calling NBNS.begin(...), the device listens on UDP port 137 and processes untrusted NBNS requests from the local network.\nThe request parser trusts the attacker-controlled name_len field without enforcing a bound consistent with the fixed-size destination buffers used later in the flow. This vulnerability is fixed in 3.3.8."}], "source": {"advisory": "GHSA-92j9-c75g-2c5f", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-27T13:10:48.792547Z", "id": "CVE-2026-41429", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-27T13:34:49.485Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-41429", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-04-27T13:10:48.792547Z"}}}], "references": [{"url": "https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-27T13:10:49.777Z"}}], "cna": {"title": "Improper validation of NBNS name_len in arduino-esp32 NetBIOS leads to memory corruption", "source": {"advisory": "GHSA-92j9-c75g-2c5f", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "espressif", "product": "arduino-esp32", "versions": [{"status": "affected", "version": "< 3.3.8"}]}], "references": [{"url": "https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f", "name": "https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontrollers. Prior to 3.3.8, there is a remotely reachable memory corruption issue in the NBNS packet handling path. When NetBIOS is enabled by calling NBNS.begin(...), the device listens on UDP port 137 and processes untrusted NBNS requests from the local network.\nThe request parser trusts the attacker-controlled name_len field without enforcing a bound consistent with the fixed-size destination buffers used later in the flow. This vulnerability is fixed in 3.3.8."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-121", "description": "CWE-121: Stack-based Buffer Overflow"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-24T19:19:49.594Z"}}}, "cveMetadata": {"cveId": "CVE-2026-41429", "state": "PUBLISHED", "dateUpdated": "2026-04-27T13:34:49.485Z", "dateReserved": "2026-04-20T15:32:33.814Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-04-24T19:19:49.594Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:espressif:arduino-esp32:*:*:*:*:*:*:*:*", "matchCriteriaId": "35B2A78F-D184-4C35-B453-38DBAC30D614", "versionEndExcluding": "3.3.8", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:espressif:esp32:-:*:*:*:*:*:*:*", "matchCriteriaId": "D1024B06-380B-4116-B7F9-A21A03534B0C", "vulnerable": false}, {"criteria": "cpe:2.3:h:espressif:esp32-c3:-:*:*:*:*:*:*:*", "matchCriteriaId": "6E01D235-2366-44F4-B671-4AE031802CC2", "vulnerable": false}, {"criteria": "cpe:2.3:h:espressif:esp32-c6:-:*:*:*:*:*:*:*", "matchCriteriaId": "6D53A06B-8672-49C0-A6CF-426C13197C76", "vulnerable": false}, {"criteria": "cpe:2.3:h:espressif:esp32-h2:-:*:*:*:*:*:*:*", "matchCriteriaId": "0D656CC6-B68D-4057-8E62-3DA86F123BF7", "vulnerable": false}, {"criteria": "cpe:2.3:h:espressif:esp32-s2:-:*:*:*:*:*:*:*", "matchCriteriaId": "59AC37EB-FABC-459C-8044-A8E2CDBD0555", "vulnerable": false}, {"criteria": "cpe:2.3:h:espressif:esp32-s3:-:*:*:*:*:*:*:*", "matchCriteriaId": "50DFAAD7-E08D-4397-BE9A-6EC44EE0624A", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontrollers. Prior to 3.3.8, there is a remotely reachable memory corruption issue in the NBNS packet handling path. When NetBIOS is enabled by calling NBNS.begin(...), the device listens on UDP port 137 and processes untrusted NBNS requests from the local network.\nThe request parser trusts the attacker-controlled name_len field without enforcing a bound consistent with the fixed-size destination buffers used later in the flow. This vulnerability is fixed in 3.3.8."}], "id": "CVE-2026-41429", "lastModified": "2026-05-05T18:12:04.277", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-04-24T20:16:27.663", "references": [{"source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "[email protected]", "type": "Secondary"}]}

{}