CVE-2026-56789: high-severity vulnerability in tomojitakasu RTKLIB
RTKLIB 2.4.3 - Heap Buffer Overflow and Stack Read via Oversized RINEX Epoch Satellite Count
Published · Updated
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41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.1epss 0.4%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
tomojitakasu · RTKLIBpublic PoCs found — 1
cve_referencegithub.com/tomojitakasu/RTKLIB/issues/796unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — tomojitakasu RTKLIB
In the same product, most dangerous first.
CVE-2026-56786CRITICALRTKLIB 2.4.3 - Out-of-bounds Write in decode_type1033 via Crafted RTCM3 MessageEPSS 0.7%CVE-2026-56787MEDIUMRTKLIB 2.4.3 - Off-by-One Out-of-Bounds Read in decode_ssr3 via RTCM3 SSR MessageEPSS 0.6%CVE-2026-56788MEDIUMRTKLIB 2.4.3 - Out-of-bounds Read via Negative Array Index in getcodepriEPSS 0.2%