{"id":"CVE-2026-65200","title":"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-supp…","summary":"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-supp…","severity":"low","cvss":3.5,"cvssVector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","cwe":["CWE-191"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T15:17:47.077","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-65200","references":[{"url":"https://www.runzero.com/advisories/huawei-malicious-device-integer-underflow-cve-2026-65200","label":"44488dab-36db-4358-99f9-bc116477f914"}],"tags":["nvd"],"ingestedAt":"2026-10-13T15:33:40.080Z","slug":"CVE-2026-65200","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":19,"depthScoreParts":{"impact":19.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}