F´: FileUplink Unknown Packet Type Assertion DoS
CVSS score
7.5
EPSS probability
—
Risk score
0.8
Published
13 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
A vulnerability in the F´ (F Prime) framework stems from a lack of range validation during Fw::FilePacket deserialization used by Svc::FileUplink. Network file packets containing an unknown file-packet type byte trigger a default assertion (FW_ASSERT), resulting in a denial of service (DoS) [S0].
This vulnerability allows network-based attacks without requiring authentication to crash or reset target applications, posing a risk to service availability [S0].
What should be done?
- Update the Fw::FilePacket deserialization logic
- Follow the vendor advisory for guidance
- Migrate to updated releases where applicable
Chain of evidence and sources
F´ çerçevesindeki Svc::FileUplink bileşeni, bilinmeyen paket türü baytlarında varsayılan FW_ASSERT tetikleyerek hizmet reddine neden olur.
Bu zafiyet 4.2.0 sürümünden önceki fprime sürümlerini etkilemektedir.
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, Fw::FilePacket deserialization used by Svc::FileUplink is vulnerable because Header deserialization casts the byte to the Type enum without validating its range and FilePacket::fromSerialBuffer reaches a default FW_ASSERT. When a network file packet contains an unknown file-packet type byte, the assertion aborts or resets the default Ref application process, causing denial of service. This issue is fixed in version 4.2.0.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-617
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-2026-92155 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 |
|---|---|---|---|---|
| 7.5 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD |
| 7.5 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-2026-92155 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-2026-92155 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
F´: Unvalidated Port Index in GenericHub
F´: File size bounds bypass in Svc::FileUplink via unsigned integer overflow in DATA packet validation
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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