CVE-2026-56789

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.

Weakness classification

• disclosure@vulncheck.com: CWE-122

Primary references

• disclosure@vulncheck.com — Exploit, Issue Tracking, Third Party Advisory
• disclosure@vulncheck.com — Third Party Advisory