Integer overflow in Nasa Fprime
CVE-2026-92157
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.
Vulnerability class: Integer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Nasa Fprime — versions < 4.3.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-92157?
- CVE-2026-92157 is a medium-severity vulnerability in Nasa Fprime, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-10-14.
- How severe is CVE-2026-92157?
- Medium severity. CVSS v3 base score is 6.5 out of 10.