CVE-2026-56786
Critical · 9.8CVSS
9.8
EPSS
0.7%
Published
Jun 25, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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