CVE-2026-56790

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 v3 7.3 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.5

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/canboat/canboat/commit/a5a22b74b9ac5688019cba62669df08562cebd6f
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-in-searchforpgn

Configurations

No configuration.

History

25 Jun 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-25 19:16

Updated : 2026-07-14 22:17

NVD link : CVE-2026-56790

Mitre link : CVE-2026-56790

CVE.ORG link : CVE-2026-56790

JSON object : View

Products Affected

No product.

CWE

CWE-193

Off-by-one Error

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