Vulnerability Description
CANBoat through 6.22, fixed in commit a5a22b7, contains an off-by-one global buffer overflow in the searchForPgn() function in analyzer/pgn.c that allows remote attackers to crash the application. Attackers can deliver a crafted NMEA-2000 message with an out-of-range PGN value over CAN bus or N2K-over-IP to trigger an out-of-bounds array access and denial of service.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/canboat/canboat/commit/a5a22b74b9ac5688019cba62669df08562cebd
- https://github.com/canboat/canboat/issues/644
- https://github.com/canboat/canboat/pull/649
- https://www.vulncheck.com/advisories/canboat-off-by-one-global-buffer-overflow-i
FAQ
What is CVE-2026-56790?
CVE-2026-56790 is a vulnerability with a CVSS score of 7.3 (HIGH). CANBoat through 6.22, fixed in commit a5a22b7, contains an off-by-one global buffer overflow in the searchForPgn() function in analyzer/pgn.c that allows remote attackers to crash the application. Att...
How severe is CVE-2026-56790?
CVE-2026-56790 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56790?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.