F´: File size bounds bypass in Svc::FileUplink via unsigned integer overflow in DATA packet validation
CVSS score
8.1
EPSS probability
—
Risk score
0.8
Published
6 h ago
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Impact on My Inventory
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
The Svc::FileUplink component in the F´ framework is vulnerable to a file size bounds bypass via an unsigned integer overflow in DATA packet validation [S0].
This flaw can cause file integrity loss and potentially large sparse-file growth or resource exhaustion [S0].
What should be done?
- Update to version 4.2.0 [S0]
- Review the provided patch references
- Follow vendor advisories
Chain of evidence and sources
Svc::FileUplink bileşeni, işaretsiz tamsayı taşması sebebiyle dosya boyutu sınırlarının aşılmasına izin verir.
Bu zafiyet dosya bütünlüğünün kaybolmasına ve kaynak tükenmesine neden olabilir.
Show the technical text from the sources
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 vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE: CWE-190
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-92154 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | nasa | fprime | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 8.1 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H | NVD |
| 8.1 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-92154 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-92154 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
F´: Unvalidated Port Index in GenericHub
F´: FileUplink Unknown Packet Type Assertion DoS
F´: GenericHub Malformed Buffer Assertion DoS
F´: SpacePacketDeframer Small Packet Assertion DoS
F´: FpySequencer Integer Overflow in Stack Offset/Size Validation Leading to Out-of-Bounds Write
F´: Arbitrary File Write in Svc::FileUplink via attacker-controlled StartPacket.destinationPath
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