NASA F Prime up to 4.2.x FileDownlink SendPartial startOffset/length denial of service

Summaryinfo

A vulnerability marked as problematic has been reported in NASA F Prime up to 4.2.x. Impacted is the function Svc::FileDownlink::SendPartial of the component FileDownlink. Performing a manipulation of the argument startOffset/length results in denial of service. This vulnerability is cataloged as CVE-2026-92157. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in NASA F Prime up to 4.2.x. This affects the function Svc::FileDownlink::SendPartial of the component FileDownlink. The manipulation of the argument startOffset/length with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to 4.3.0, Svc::FileDownlink SendPartial range validation is vulnerable because unchecked startOffset plus length arithmetic bypasses the range check and stores a wrapped m_endOffset that is inconsistent with m_byteOffset. When an existing source file is larger than a valid startOffset and a SendPartial command supplies a length whose U32 sum with that offset wraps below the file size, under standard F Prime assertion handling, the first data-packet transition reaches FW_ASSERT and aborts or resets the process, causing denial of service. This issue is fixed in version 4.3.0.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-92157 since 09/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 4.3.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• NASA

Name

• F Prime

Version

• 4.0
• 4.1
• 4.2

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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