What’s Vulnerable › Vulnerabilities

CVE-2026-56788: RTKLIB 2.4.3 - Out-of-bounds Read via Negative Array Index in getcodepri

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-25 · updated 2026-10-25
• Weakness: CWE-125

Description

RTKLIB through 2.4.3 contains an out-of-bounds read vulnerability in getcodepri function when processing unrecognized RINEX observation codes, allowing attackers to trigger denial of service. Crafted RINEX files with unknown observation types cause negative array indexing into the codepris table, resulting in reliable crashes and potential memory disclosure of adjacent global data.

Affected products

• tomojitakasu RTKLIB: through 2.4.3

References

• https://github.com/tomojitakasu/RTKLIB/issues/797
• https://www.vulncheck.com/advisories/rtklib-out-of-bounds-read-via-negative-array-index-in-getcodepri
• https://github.com/tomojitakasu/RTKLIB/issues/797

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