Buffer overflow in Rtklib
CVE-2026-56789
RTKLIB through 2.4.3 contains a heap buffer overflow vulnerability in the readrnxobsb function in src/rinex.c that allows attackers to trigger memory corruption by failing to clamp satellite count values from RINEX epoch headers. Attackers…
Vulnerability class: Buffer Overflow
EPSS: 0.002 (16.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Rtklib
- Tomojitakasu Rtklib — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, technical-description, Third Party Advisory, exploit, Issue Tracking)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-56789?
- CVE-2026-56789 is a medium-severity vulnerability in Rtklib, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-06-25.
- How severe is CVE-2026-56789?
- Medium severity. CVSS v3 base score is 6.5 out of 10.