{"id":"CVE-2026-56790","title":"CANBoat - Off-by-One Global Buffer Overflow in searchForPgn()","summary":"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-200…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H","cvssSource":"cna","cwe":["CWE-193"],"vendor":"canboat","product":"canboat","affected":["canboat <= 6.22"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-25T21:36:05.015469Z"},"exploitAvailable":true,"published":"2026-06-25","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:06:28.433Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56790","references":[{"url":"https://github.com/canboat/canboat/issues/644","label":"Researcher Disclosure"},{"url":"https://github.com/canboat/canboat/pull/649","label":"Pull Request"},{"url":"https://github.com/canboat/canboat/commit/a5a22b74b9ac5688019cba62669df08562cebd6f","label":"Patch Commit"},{"url":"https://www.vulncheck.com/advisories/canboat-off-by-one-global-buffer-overflow-in-searchforpgn"}],"tags":["cve.org","exploit-available"],"epss":0.00309,"epssPercentile":0.23889,"ingestedAt":"2026-11-08T14:51:22.328Z","slug":"CVE-2026-56790","body":"## Overview\n\nCANBoat 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.\n\n## Affected\n\n- `canboat <= 6.22`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":40.2,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}