{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-65200","assignerOrgId":"44488dab-36db-4358-99f9-bc116477f914","state":"PUBLISHED","assignerShortName":"runZero","dateReserved":"2026-07-21T20:14:38.328Z","datePublished":"2026-10-13T14:19:51.462Z","dateUpdated":"2026-10-14T18:58:04.702Z"},"containers":{"cna":{"providerMetadata":{"orgId":"44488dab-36db-4358-99f9-bc116477f914","shortName":"runZero","dateUpdated":"2026-10-13T14:19:51.462Z"},"title":"Huawei malicious on-bus PLDM or NCSI device can drive out-of-bounds-heap reads via short MCTP responses","datePublic":"2026-10-13T14:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-191","description":"CWE-191 Integer underflow (wrap or wraparound)","type":"CWE"}]}],"affected":[{"vendor":"Huawei","product":"openBMC","versions":[{"status":"affected","version":"0","lessThanOrEqual":"26.06","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"The openUBMC device-management process parses PLDM-over-MCTP and NCSI-over-MCTP responses from on-bus devices, and three response parsers in the shared transport libraries subtract a fixed header or reserved-field size from a device-supplied response length without a lower-bound check. An undersized response wraps the unsigned length difference to a very large value, and the parser then reads far past the response buffer. The affected code sits in the base (non-vendor) PLDM control class and the Huawei NCSI driver, so it is reachable for any PLDM endpoint or Huawei NIC on the internal management bus, unlike the vendor-specific wangxun parser tracked separately.","supportingMedia":[{"type":"text/html","base64":false,"value":"The openUBMC device-management process parses PLDM-over-MCTP and NCSI-over-MCTP responses from on-bus devices, and three response parsers in the shared transport libraries subtract a fixed header or reserved-field size from a device-supplied response length without a lower-bound check. An undersized response wraps the unsigned length difference to a very large value, and the parser then reads far past the response buffer. The affected code sits in the base (non-vendor) PLDM control class and the Huawei NCSI driver, so it is reachable for any PLDM endpoint or Huawei NIC on the internal management bus, unlike the vendor-specific wangxun parser tracked separately."}]}],"references":[{"url":"https://www.runzero.com/advisories/huawei-malicious-device-integer-underflow-cve-2026-65200","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"PHYSICAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"LOW","baseSeverity":"LOW","baseScore":3.5,"vectorString":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"}},{"other":{"type":"ssvc","content":{"options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CNA","version":"2.0.3"}},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"credits":[{"lang":"en","value":"HD Moore of runZero","type":"finder"},{"lang":"en","value":"Tod Beardsley of runZero","type":"coordinator"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-14T18:57:49.030835Z","id":"CVE-2026-65200","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":"2026-10-14T18:58:04.702Z"}}]}}