---
id: CVE-2026-92154
title: >-
  F´ (F Prime) is a framework that enables development and deployment of
  spaceflight and other embedded software applications
summary: >-
  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 …
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-190
vendor: nasa
product: fprime
affected:
  - fprime < 4.2.0
published: '2026-10-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:48.477'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92154'
references:
  - url: >-
      https://github.com/nasa/fprime/commit/cacdd555456bd83ab395b521d56c0330470ea798
    label: security-advisories@github.com
  - url: 'https://github.com/nasa/fprime/pull/4919'
    label: security-advisories@github.com
  - url: 'https://github.com/nasa/fprime/security/advisories/GHSA-wx8q-q5gx-f54p'
    label: security-advisories@github.com
  - url: 'https://github.com/nasa/fprime/security/advisories/GHSA-wx8q-q5gx-f54p'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T18:54:50.578904Z'
ingestedAt: '2026-10-14T18:47:39.321Z'
epss: 0.00614
epssPercentile: 0.49211
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.