{"id":"UBUNTU-CVE-2026-56770","details":"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.","modified":"2026-06-29T23:19:15.541733358Z","published":"2026-06-25T19:16:00Z","upstream":["CVE-2026-56770"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-56770"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-56770"},{"type":"REPORT","url":"https://github.com/schwehr/libais/issues/263"}],"affected":[{"package":{"name":"python-libais","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/python-libais?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.17+git.20190917.master.e464cf8-2build2","0.17+git.20190917.master.e464cf8-2build3","0.17+git.20190917.master.e464cf8-3","0.17+git.20190917.master.e464cf8-3build1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.17+git.20190917.master.e464cf8-3build1","binary_name":"libais-tools"},{"binary_name":"python3-ais","binary_version":"0.17+git.20190917.master.e464cf8-3build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56770.json"}},{"package":{"name":"python-libais","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/python-libais?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.17+git.20190917.master.e464cf8-3build3","0.17+git.20190917.master.e464cf8-4","0.17+git.20190917.master.e464cf8-4build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libais-tools","binary_version":"0.17+git.20190917.master.e464cf8-4build1"},{"binary_version":"0.17+git.20190917.master.e464cf8-4build1","binary_name":"python3-ais"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56770.json"}},{"package":{"name":"python-libais","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/python-libais?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.17+git.20190917.master.e464cf8-5build1","0.17+git.20190917.master.e464cf8-6"],"ecosystem_specific":{"binaries":[{"binary_name":"libais-tools","binary_version":"0.17+git.20190917.master.e464cf8-6"},{"binary_version":"0.17+git.20190917.master.e464cf8-6","binary_name":"python3-ais"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56770.json"}},{"package":{"name":"python-libais","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/python-libais?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.17+git.20190917.master.e464cf8-6","0.17+git.20190917.master.e464cf8-6build1","0.17+git.20190917.master.e464cf8-6build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libais-tools","binary_version":"0.17+git.20190917.master.e464cf8-6build2"},{"binary_version":"0.17+git.20190917.master.e464cf8-6build2","binary_name":"python3-ais"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56770.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}