CVE-2026-56786
Critical · CVSS 9.8RTKLIB — Out-of-bounds write (stack/heap buffer overflow) via crafted RTCM3 message
- CVSS
- 9.8
- nvd
- EPSS
- —
- KEV
- No
- Class
- other
- CWE-787
Description
RTKLIB through 2.4.3 contains an out-of-bounds write vulnerability in decode_type1033 function that fails to clamp length counters to destination buffer size, allowing up to 191-byte overflow into fixed 64-byte descriptor fields. An attacker controlling an NTRIP or serial RTCM3 correction stream can craft a valid CRC-bearing type-1033 message to corrupt adjacent rtcm_t object members, potentially achieving arbitrary code execution or denial of service.
Search profile — drives PoC discovery
Symbols decode_type1033rtcm_tdecode_rtcm3rtcm3.ctype1033NTRIPRTCM3rcvdescantdescrcvtypeanttype
Keywords CVE-2026-56786RTKLIBdecode_type1033out-of-bounds writeRTCM3 type-1033CWE-787NTRIP correction streamrtcm_t buffer overflowRTKLIB 2.4.3 PoCRTKLIB exploitRTCM3 crafted message RCE
Versions: through 2.4.3
References
Status: enriched · ingested 2026-07-15T00:00:20.000Z · profiled 2026-07-15T00:30:20.000Z