{"schemaVersion":3,"id":"CVE-2026-65200","aliases":[],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-10-13T14:19:51.462Z","modified":"2026-10-14T18:58:04.702Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":3.5,"severity":"low","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":3.5,"severity":"low","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":3.5,"severity":"low","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00143,"percentile":0.03219,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-14T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00143,"percentile":0.03219}],"last30":[{"date":"2026-10-14T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00143,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00143,"percentile":0.03219}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)","description":"The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/191.html"}],"affected":[{"vendor":"huawei","product":"openbmc","name":"openBMC","label":"openbmc","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 26.06","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 26.06","eol":null,"hubHref":"/vendor/huawei/openbmc"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.runzero.com/advisories/huawei-malicious-device-integer-underflow-cve-2026-65200","label":"www.runzero.com/advisories/huawei-malicious-device-integer-underflow-cve-2026-65200","hostname":"www.runzero.com","tags":["Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-13T14:19:51.462Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-14T18:58:04.702Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":14,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T19:13:12.878Z","stale":false,"partial":false}}