High severity7.3NVD Advisory· Published Jun 25, 2026· Updated Jul 14, 2026

CVE-2026-56790

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.

Affected products

Canboat/canboatllm-fuzzy
Range: <=6.22

Patches

Vulnerability mechanics

References

github.com/canboat/canboat/commit/a5a22b74b9ac5688019cba62669df08562cebd6fnvd
github.com/canboat/canboat/issues/644nvd
github.com/canboat/canboat/pull/649nvd
www.vulncheck.com/advisories/canboat-off-by-one-global-buffer-overflow-in-searchforpgnnvd

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