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CVE-2026-56790highCWE-193

CANBoat - Off-by-One Global Buffer Overflow in searchForPgn()

41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 7epss 0.2%
exploitation probability
0.2%top 88% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
canboat · canboat
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.