{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-37537", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-05-01T19:44:56.296Z", "dateReserved": "2026-04-06T00:00:00.000Z", "datePublished": "2026-05-01T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-05-01T16:49:37.914Z"}, "descriptions": [{"lang": "en", "value": "collin80/Open-SAE-J1939 thru commit 744024d4306bc387857dfce439558336806acb06 (2023-03-08) contains an integer underflow leading to out-of-bounds write in Transport Protocol Data Transfer handling. At line 23: uint8_t index = data[0] - 1. When data[0] (sequence number from CAN frame) is 0, index underflows to 255. Subsequent write at tp_dt->data[255*7 + i-1] reaches offset 1791, exceeding the MAX_TP_DT buffer (1785 bytes) by 6 bytes."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/DanielMartensson/Open-SAE-J1939"}, {"url": "https://github.com/collin80/Open-SAE-J1939"}, {"url": "https://gist.github.com/sgInnora/f4ac66faeefe07a653ceeb3f58cdc381"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AC:L/AV:A/A:H/C:N/I:H/PR:N/S:U/UI:N", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH"}}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-190", "lang": "en", "description": "CWE-190 Integer Overflow or Wraparound"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-01T19:31:32.147113Z", "id": "CVE-2026-37537", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-01T19:44:56.296Z"}}]}, "dataVersion": "5.2"}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "744024d4306bc387857dfce439558336806acb06"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "open-sae-j1939", "vendor": "collin80"}], "created": "2026-05-02T08:00:14.111929+00:00", "title": "Integer Underflow Leading to Out-of-Bounds Write in J1939 Transport Protocol", "updated": "2026-05-04T19:44:41.130370+00:00", "vendors": ["collin80", "collin80$PRODUCT$open-sae-j1939"]}