Vulnerability details

CVE-2026-92154

nasa fprime

F´: File size bounds bypass in Svc::FileUplink via unsigned integer overflow in DATA packet validation

CVSS 3.1

8.1High

Official 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.

CVSS scores

Score	Version	Source	Vector
8.1High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
nasa	fprime	< 4.2.0	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/nasa/fprime/pull/4919 x_refsource_MISC
https://github.com/nasa/fprime/commit/cacdd555456bd83ab395b521d56c0330470ea798 x_refsource_MISC
https://github.com/nasa/fprime/security/advisories/GHSA-wx8q-q5gx-f54p x_refsource_CONFIRM

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Details

Published: 2026-10-14
Last updated: 2026-10-15
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.61%

Probability of exploitation in 30 days

49.6%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-190
Integer Overflow or Wraparound