Vulnerability Description
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 can craft malicious RINEX files declaring more than 64 satellites per epoch to cause heap buffer overflow writes and out-of-bounds stack reads, crashing RTKLIB-based applications including rnx2rtkp and RTKPOST.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Rtklib | Rtklib | <= 2.4.3 |
Related Weaknesses (CWE)
References
- https://github.com/tomojitakasu/RTKLIB/issues/796ExploitIssue TrackingThird Party Advisory
- https://www.vulncheck.com/advisories/rtklib-heap-buffer-overflow-and-stack-read-Third Party Advisory
FAQ
What is CVE-2026-56789?
CVE-2026-56789 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 val...
How severe is CVE-2026-56789?
CVE-2026-56789 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56789?
Check the references section above for vendor advisories and patch information. Affected products include: Rtklib Rtklib.