COVESA Open1722 0.9.2 Stack Memory Disclosure via acf-can-listener.c Integer Truncation

{
  "id": "47e0d369dd8c151abfe99894e4e7a00e16d251fc7a21a92e3bc2ebaffc6bf149",
  "url": "https://osv.dev/vulnerability/CVE-2026-73523",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "COVESA Open1722 0.9.2 Stack Memory Disclosure via acf-can-listener.c Integer Truncation",
    "summary": "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.",
    "evidence": "osv:CVE-2026-73523",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-73523",
      "aliases": [
        "CVE-2026-73523"
      ],
      "metrics": [
        {
          "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/covesa/open1722",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "473309bda59fc27dcafeb5b817c385cd1e1bc985"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.9.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1722"
                      },
                      {
                        "last_affected": "0.9.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.9.2",
            "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"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.339606519Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73523.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-73523",
        "https://www.vulncheck.com/advisories/covesa-open1722-stack-memory-disclosure-via-acf-can-listener-c-integer-truncation",
        "https://github.com/COVESA/Open1722/issues/154",
        "https://github.com/COVESA/Open1722"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-197"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73523.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-73523",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522335,
  "published_at": "2026-08-17T18:00:01.521+00:00"
}