CVE-2026-65200 json
Huawei malicious on-bus PLDM or NCSI device can drive out-of-bounds-heap reads via short MCTP responses
published 2026-10-13 26 d ago modified 2026-10-16 23 d ago also EUVD-2026-98752
- cvss
- 3.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
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-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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 25 d ago
Exploit prediction
0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.5 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L |
Affected products
- Huawei openBMC
Classification
- Weakness
-
- CWE-191 Integer Underflow (Wrap or Wraparound)
References
-
runzero.com
/advisories/huawei-malicious-device-integer-underflow-cve-2026-65200
third-party-advisory
Sources
- CVE List CVE-2026-65200
- NVD CVE-2026-65200
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