CVE-2026-56789 (GCVE-0-2026-56789)
Vulnerability from cvelistv5 – Published: 2026-06-25 18:14 – Updated: 2026-11-08 14:06 X_Open Source
VLAI
EPSS
VEX
Title
RTKLIB 2.4.3 - Heap Buffer Overflow and Stack Read via Oversized RINEX Epoch Satellite Count
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 18:24 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tomojitakasu/RTKLIB/issues/796 | technical-descriptionexploitissue-tracking |
| https://www.vulncheck.com/advisories/rtklib-heap-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tomojitakasu | RTKLIB |
Affected:
0 , ≤ 2.4.3
(semver)
|
Date Public
2026-06-09 00:00
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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