Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 15.0%
CVSS Severity
CVSS v3 Score 6.5
References