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TI-2026-74395 Aliases CVE-2026-92157

F´: FileDownlink SendPartial integer overflow lets legal startOffset/length values reach a reachable assertion

Priority MEDIUM 62CWE-190Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to 4.3.0, Svc::FileDownlink SendPartial range validation is vulnerable because unchecked startOffset plus length arithmetic bypasses the range check and stores a wrapped m_endOffset that is inconsistent with m_byteOffset. When an existing source file is larger than a valid startOffset and a SendPartial command supplies a length whose U32 sum with that offset wraps below the file size, under standard F Prime assertion handling, the first data-packet transition reaches FW_ASSERT and aborts or resets the process, causing denial of service. This issue is fixed in version 4.3.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00584 48th percentileScored 2026-11-07
Fix Fixed fprime (nasa): 4.3.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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 4.3.04.3.0Patch availableCNA
  • fprime Vendornasa Affected before 4.3.0 Fixed in 4.3.0 Patch available CNA

Remediation

  • Fix · CNA fprime (nasa) Fixed in 4.3.0

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-92157
  2. 2026-10-16 Priority changed: MEDIUM → LOW
  3. 2026-10-20 CISA SSVC decision points changed
  4. 2026-10-20 Priority changed: LOW → MEDIUM

References

Other 5

  • 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