Huawei openBMC up to 26.06 Huawei NCSI driver integer overflow

Summaryinfo

A vulnerability described as very critical has been identified in Huawei openBMC up to 26.06. This affects an unknown part of the component Huawei NCSI driver. Such manipulation leads to integer overflow. This vulnerability is documented as CVE-2026-65200. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Huawei openBMC up to 26.06. It has been rated as very critical. Affected by this issue is an unknown code block of the component Huawei NCSI driver. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at runzero.com. This vulnerability is handled as CVE-2026-65200 since 07/21/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 10/13/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Huawei

Name

• openBMC

Version

• 26.06

License

• commercial

Website

• Vendor: https://www.huawei.com/

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