F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to 4.2.0, Svc::FileUplink handleDataPacket offset and size validation is vulnerable because the component checks byteOffset plus dataSize with wrapping U32 arithmetic and then seeks to the large attacker-controlled offset before writing. When a file-uplink DATA packet supplies a byteOffset and dataSize whose unsigned sum wraps below the declared file size, data can be written beyond the declared upload size, causing file integrity loss and potentially large sparse-file growth or resource exhaustion. This issue is fixed in version 4.2.0.
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Fixes

Solution

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Workaround

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History

Thu, 15 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 14 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Description F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to 4.2.0, Svc::FileUplink handleDataPacket offset and size validation is vulnerable because the component checks byteOffset plus dataSize with wrapping U32 arithmetic and then seeks to the large attacker-controlled offset before writing. When a file-uplink DATA packet supplies a byteOffset and dataSize whose unsigned sum wraps below the declared file size, data can be written beyond the declared upload size, causing file integrity loss and potentially large sparse-file growth or resource exhaustion. This issue is fixed in version 4.2.0.
Title F´: File size bounds bypass in Svc::FileUplink via unsigned integer overflow in DATA packet validation
Weaknesses CWE-190
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-15T18:55:39.170Z

Reserved: 2026-09-15T17:13:57.865Z

Link: CVE-2026-92154

cve-icon Vulnrichment

Updated: 2026-10-15T18:55:16.895Z

cve-icon NVD

Status : Deferred

Published: 2026-10-14T18:19:34.630

Modified: 2026-10-15T19:17:48.477

Link: CVE-2026-92154

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-15T15:00:15Z

Weaknesses