CANBoat – Off-by-One Global Buffer Overflow in searchForPgn()_CVE-2026-56790

7 / 10

HIGH

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N

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.

Basic Information

ID CVE-2026-56790

Source VulnCheck

Published Jun 25, 2026 at 18:14

Affected Product

Vendor canboat

Product canboat

Affected Versions canboat canboat 0

CWE Classification

CWE-193

References

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    "published": "2026-06-25T18:14:48.573Z",
    "modified": "2026-06-25T18:14:48.573Z",
    "type": "cve",
    "title": "CANBoat - Off-by-One Global Buffer Overflow in searchForPgn()",
    "source": "VulnCheck",
    "references": "https://github.com/canboat/canboat/issues/644\nhttps://github.com/canboat/canboat/pull/649\nhttps://github.com/canboat/canboat/commit/a5a22b74b9ac5688019cba62669df08562cebd6f\nhttps://www.vulncheck.com/advisories/canboat-off-by-one-global-buffer-overflow-in-searchforpgn",
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