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9.3
CVE-2026-56786: RTKLIB versions 2.4.3 and below: Out-of-bounds write risk in decode_type1033 function
CVE-2026-56786
CVE-2026-56786
Summary
RTKLIB, a software library used for GPS and GLONASS data processing, has a security flaw that could allow an attacker to corrupt data and potentially take control of the system. This issue affects versions 2.4.3 and below. Update to a fixed version to mitigate the risk.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| tomojitakasu | rtklib | <= 2.4.3 |
Original title
RTKLIB 2.4.3 - Out-of-bounds Write in decode_type1033 via Crafted RTCM3 Message
Original 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.
nvd CVSS3.1
9.8
nvd CVSS4.0
9.3
Vulnerability type
CWE-787
Out-of-bounds Write
Published: 25 Jun 2026 · Updated: 23 Jul 2026 · First seen: 25 Jun 2026