{"id":"CVE-2026-65200","state":"PUBLISHED","title":"Huawei malicious on-bus PLDM or NCSI device can drive out-of-bounds-heap reads via short MCTP responses","description":"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.","publishedAt":"2026-10-13T14:19:51.462Z","updatedAt":"2026-10-14T18:58:04.702Z","severity":{"score":3.5,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","source":"runZero"},"assigner":"runZero","products":["Huawei openBMC"],"affected":[{"vendor":"Huawei","product":"openBMC","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"26.06","versionType":"semver"}]}],"references":["https://www.runzero.com/advisories/huawei-malicious-device-integer-underflow-cve-2026-65200"],"weaknesses":["CWE-191"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/65xxx/CVE-2026-65200.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-65200","state":"PUBLISHED","datePublished":"2026-10-13T14:19:51.462Z","dateUpdated":"2026-10-14T18:58:04.702Z","assignerShortName":"runZero","assignerOrgId":"44488dab-36db-4358-99f9-bc116477f914","dateReserved":"2026-07-21T20:14:38.328Z"},"containers":{"cna":{"title":"Huawei malicious on-bus PLDM or NCSI device can drive out-of-bounds-heap reads via short MCTP responses","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."}],"affected":[{"vendor":"Huawei","product":"openBMC","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"26.06","versionType":"semver"}]}],"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"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-191","lang":"en","description":"CWE-191 Integer underflow (wrap or wraparound)","type":"CWE"}]}],"providerMetadata":{"shortName":"runZero","orgId":"44488dab-36db-4358-99f9-bc116477f914","dateUpdated":"2026-10-13T14:19:51.462Z"},"datePublic":"2026-10-13T14:00:00.000Z","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":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-14T18:58:04.702Z"}}]}}}