CVE-2026-56788
RTKLIB 2.4.3 - Out-of-bounds Read via Negative Array Index in getcodepri
Vexday Risk Score
33Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 4.8EPSS 0.1%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
25 Jun 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Affected products
tomojitakasu · RTKLIBpublic PoCs found — 1
cve_referencegithub.com/tomojitakasu/RTKLIB/issues/797unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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