{"id":"CVE-2026-73523","summary":"COVESA Open1722 0.9.2 Stack Memory Disclosure via acf-can-listener.c Integer Truncation","details":"COVESA Open1722 through 0.9.2 contains an integer truncation vulnerability in acf-can-listener.c that allows unauthenticated remote attackers to cause the CAN listener to transmit process stack memory onto the CAN bus by sending a rejected UDP datagram with a matching AVTP stream ID. The num_can_msgs variable declared as uint8_t truncates the -1 error return value from avtp_to_can() to 255, causing a write loop to iterate 255 times over a 15-slot stack array and leak approximately 18 KB of adjacent stack memory as roughly 240 CAN frames to any recipient on the CAN bus.","modified":"2026-08-19T03:48:32.880951354Z","published":"2026-08-17T18:00:01.521Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-197"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73523.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73523.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73523"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/covesa-open1722-stack-memory-disclosure-via-acf-can-listener-c-integer-truncation"},{"type":"REPORT","url":"https://github.com/COVESA/Open1722/issues/154"},{"type":"PACKAGE","url":"https://github.com/COVESA/Open1722"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/covesa/open1722","events":[{"introduced":"0"},{"fixed":"473309bda59fc27dcafeb5b817c385cd1e1bc985"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION"],"extracted_events":[{"introduced":"0"},{"last_affected":"0.9.2"},{"introduced":"Open1722"},{"fixed":"0.9.2"}]}}],"versions":["v0.9.1","v0.9.0","v0.8.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73523.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}