{"id":"USN-8807-1","summary":"Open-iSNS vulnerability","details":"It was discovered that Open-iSNS contained a double-free vulnerability when\ndecoding malformed iSNS attributes. An unauthenticated attacker could possibly\n use this to cause a denial of service.","modified":"2026-09-24T13:11:45.515576785Z","published":"2026-09-23T17:07:59Z","related":["UBUNTU-CVE-2026-55995"],"upstream":["CVE-2026-55995","UBUNTU-CVE-2026-55995"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8807-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-55995"}],"affected":[{"package":{"name":"open-isns","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/open-isns?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.97-2ubuntu0.1~esm1"}]}],"versions":["0.97-2","0.97-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libisns0","binary_version":"0.97-2ubuntu0.1~esm1"},{"binary_name":"open-isns-discoveryd","binary_version":"0.97-2ubuntu0.1~esm1"},{"binary_name":"open-isns-server","binary_version":"0.97-2ubuntu0.1~esm1"},{"binary_name":"open-isns-utils","binary_version":"0.97-2ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"severity":[{"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"}],"id":"CVE-2026-55995"}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8807-1.json"}},{"package":{"name":"open-isns","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/open-isns?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.97-3ubuntu0.1~esm1"}]}],"versions":["0.97-3"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libisns0","binary_version":"0.97-3ubuntu0.1~esm1"},{"binary_version":"0.97-3ubuntu0.1~esm1","binary_name":"open-isns-discoveryd"},{"binary_name":"open-isns-server","binary_version":"0.97-3ubuntu0.1~esm1"},{"binary_version":"0.97-3ubuntu0.1~esm1","binary_name":"open-isns-utils"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8807-1.json","cves_map":{"cves":[{"id":"CVE-2026-55995","severity":[{"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":"CVSS_V4"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:20.04:LTS"}}},{"package":{"name":"open-isns","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/open-isns?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.101-0ubuntu2.1"}]}],"versions":["0.100-3ubuntu3","0.100-3ubuntu4","0.100-3ubuntu5","0.101-0ubuntu1","0.101-0ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libisns0","binary_version":"0.101-0ubuntu2.1"},{"binary_version":"0.101-0ubuntu2.1","binary_name":"open-isns-discoveryd"},{"binary_name":"open-isns-server","binary_version":"0.101-0ubuntu2.1"},{"binary_version":"0.101-0ubuntu2.1","binary_name":"open-isns-utils"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-55995","severity":[{"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"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8807-1.json"}},{"package":{"name":"open-isns","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/open-isns?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.101-0.3ubuntu0.1"}]}],"versions":["0.101-0.2","0.101-0.3","0.101-0.3build1","0.101-0.3build2","0.101-0.3build3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.101-0.3ubuntu0.1","binary_name":"libisns0t64"},{"binary_name":"open-isns-discoveryd","binary_version":"0.101-0.3ubuntu0.1"},{"binary_name":"open-isns-server","binary_version":"0.101-0.3ubuntu0.1"},{"binary_name":"open-isns-utils","binary_version":"0.101-0.3ubuntu0.1"}],"availability":"No 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