CVE Catalog

CVE-2026-56790

HighCVSS 7.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

12th percentile - higher than 12% of all known CVEs

Summary

The vulnerability in CANBoat through version 6.22 (fixed in commit a5a22b7) contains an off-by-one global buffer overflow in the searchForPgn() function in analyzer/pgn.c. A remote attacker 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 crash the application.

Risk Assessment

The risk is a remote denial of service (DoS) attack that can disrupt systems relying on CANBoat for onboard network communication (e.g., in vehicles or boats) by sending a specially crafted message.

Recommendation

Immediately update CANBoat to a version containing commit a5a22b7 or later. If an update is not possible, restrict access to CAN/N2K-over-IP interfaces to trusted sources only.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS