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TI-2026-74392 Aliases CVE-2026-92154

Integer overflow in F Prime FileUplink bypasses file size checks

Priority HIGH 70CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

F´ (F Prime) versions before 4.2.0 are affected. In Svc::FileUplink, the DATA packet check of byteOffset plus dataSize uses wrapping unsigned 32-bit arithmetic, so an overflowed sum passes validation (CWE-190). A remote attacker with low privileges can write data beyond the declared upload size, corrupting file integrity and possibly growing sparse files or exhausting resources.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00614 49th percentileScored 2026-11-07
Fix Fixed fprime (nasa): 4.2.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nasafprimebefore 4.2.04.2.0Patch availableCNA
  • fprime Vendornasa Affected before 4.2.0 Fixed in 4.2.0 Patch available CNA

Remediation

Upgrade F´ (F Prime) to version 4.2.0, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA fprime (nasa) Fixed in 4.2.0

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-92154
  2. 2026-10-16 CISA SSVC decision points changed
  3. 2026-10-16 Priority changed: MEDIUM → HIGH

References

Other 3

  • TI-2025-21552 CryptoLib Has Heap Overflow in Crypto_TM_ProcessSecurity due to Unchecked Secondary Header Length CVSS 3.1CRITICAL 9.4
  • TI-2025-18986 The Memory Management Module of NASA cFS (Core Flight System) Aquila has insecure… CVSS 3.1CRITICAL 9.8
  • TI-2024-36754 A command injection vulnerability in the Command Dispatcher Service of NASA Fprime v3.4.3… CVSS 3.1CRITICAL 9.8
  • TI-2024-36752 A template injection vulnerability in the Dashboard of NASA Fprime v3.4.3 allows… CVSS 3.1CRITICAL 9.8
  • TI-2026-42833 AIT-DSN < 2.2.2 Missing Authentication via SLE API Routes CVSS 4.0CRITICAL 9.3
  • TI-2025-21662 Heap Buffer Overflow via Incomplete Length Check in `Crypto_TC_ApplySecurity` CVSS 4.0CRITICAL 9.3
See all 86 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences