python-libais — security advisory

{
  "id": "94b68143be13c0c04cb2e180e425a968c106ecaff839cb75dc2e5d1935f3eecb",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-56770",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-56770",
    "summary": "libais through 0.15 VdmStream::AddLine uses an unchecked sentinel value as a vector index when processing AIS sentences with empty or out-of-range sequential message IDs. Remote attackers can crash services or vessel systems by sending crafted AIVDM sentences over VHF marine radio or IP feeds, causing out-of-bounds memory access and potential corruption.",
    "evidence": "osv:DEBIAN-CVE-2026-56770",
    "products": [
      {
        "name": {
          "value": "python-libais",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.17+git.20190917.master.e464cf8-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.17+git.20190917.master.e464cf8-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.17+git.20190917.master.e464cf8-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.17+git.20190917.master.e464cf8-6",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "python-libais",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.17+git.20190917.master.e464cf8-5",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "0.17+git.20190917.master.e464cf8-6",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "python-libais",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.17+git.20190917.master.e464cf8-5",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.17+git.20190917.master.e464cf8-6",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2026-56770",
      "aliases": [
        "DEBIAN-CVE-2026-56770"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "python-libais",
            "purl": "pkg:deb/debian/python-libais?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "0.17+git.20190917.master.e464cf8-3",
            "0.17+git.20190917.master.e464cf8-4",
            "0.17+git.20190917.master.e464cf8-5",
            "0.17+git.20190917.master.e464cf8-6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56770.json"
          },
          "ecosystem_specific": {
            "urgency": "unimportant"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "python-libais",
            "purl": "pkg:deb/debian/python-libais?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "0.17+git.20190917.master.e464cf8-5",
            "0.17+git.20190917.master.e464cf8-6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56770.json"
          },
          "ecosystem_specific": {
            "urgency": "unimportant"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "python-libais",
            "purl": "pkg:deb/debian/python-libais?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "0.17+git.20190917.master.e464cf8-5",
            "0.17+git.20190917.master.e464cf8-6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56770.json"
          },
          "ecosystem_specific": {
            "urgency": "unimportant"
          }
        }
      ],
      "modified": "2026-10-26T11:47:34.753604425Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-56770"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-56770"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-56770",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 450904,
  "published_at": "2026-06-25T19:16:44.113+00:00"
}