{"id":"UBUNTU-CVE-2026-55995","details":"A Double Free vulnerability in open-iscsi allows an unauthenticated MITM attacker to cause DoS. This issue affects open-iscsi: from ? through 56718d4e9d1a4f51c30697b5c0534144bb41c9bb.","modified":"2026-08-06T03:10:21.268866451Z","published":"2026-07-29T14:16:00Z","upstream":["CVE-2026-55995"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-55995"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-55995"}],"affected":[{"package":{"name":"open-iscsi","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/open-iscsi?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.873-3ubuntu7","2.0.873-3ubuntu8","2.0.873-3ubuntu9"],"ecosystem_specific":{"binaries":[{"binary_name":"open-iscsi","binary_version":"2.0.873-3ubuntu9"},{"binary_name":"open-iscsi-utils","binary_version":"2.0.873-3ubuntu9"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"}},{"package":{"name":"open-iscsi","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/open-iscsi?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.873-3ubuntu13","2.0.873+git0.3b4b4500-13ubuntu3","2.0.873+git0.3b4b4500-14ubuntu1","2.0.873+git0.3b4b4500-14ubuntu3","2.0.873+git0.3b4b4500-14ubuntu3.1","2.0.873+git0.3b4b4500-14ubuntu3.2","2.0.873+git0.3b4b4500-14ubuntu3.3","2.0.873+git0.3b4b4500-14ubuntu3.4","2.0.873+git0.3b4b4500-14ubuntu3.5","2.0.873+git0.3b4b4500-14ubuntu3.6","2.0.873+git0.3b4b4500-14ubuntu3.7","2.0.873+git0.3b4b4500-14ubuntu3.7+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.873+git0.3b4b4500-14ubuntu3.7+esm1","binary_name":"open-iscsi"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"}},{"package":{"name":"open-iscsi","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/open-iscsi?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.874-4ubuntu3","2.0.874-4ubuntu4","2.0.874-4ubuntu5","2.0.874-5ubuntu1","2.0.874-5ubuntu2","2.0.874-5ubuntu2.1","2.0.874-5ubuntu2.2","2.0.874-5ubuntu2.3","2.0.874-5ubuntu2.4","2.0.874-5ubuntu2.6","2.0.874-5ubuntu2.7","2.0.874-5ubuntu2.9","2.0.874-5ubuntu2.10","2.0.874-5ubuntu2.11","2.0.874-5ubuntu2.11+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"iscsiuio","binary_version":"2.0.874-5ubuntu2.11+esm1"},{"binary_version":"2.0.874-5ubuntu2.11+esm1","binary_name":"open-iscsi"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"}},{"package":{"name":"open-isns","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/open-isns?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.97-2","0.97-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libisns0","binary_version":"0.97-2build1"},{"binary_name":"open-isns-discoveryd","binary_version":"0.97-2build1"},{"binary_name":"open-isns-server","binary_version":"0.97-2build1"},{"binary_name":"open-isns-utils","binary_version":"0.97-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"}},{"package":{"name":"open-iscsi","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/open-iscsi?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.874-7.1ubuntu3","2.0.874-7.1ubuntu5","2.0.874-7.1ubuntu6","2.0.874-7.1ubuntu6.1","2.0.874-7.1ubuntu6.2","2.0.874-7.1ubuntu6.3","2.0.874-7.1ubuntu6.4","2.0.874-7.1ubuntu6.5"],"ecosystem_specific":{"binaries":[{"binary_name":"iscsiuio","binary_version":"2.0.874-7.1ubuntu6.5"},{"binary_version":"2.0.874-7.1ubuntu6.5","binary_name":"open-iscsi"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"}},{"package":{"name":"open-isns","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/open-isns?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.97-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libisns0","binary_version":"0.97-3"},{"binary_version":"0.97-3","binary_name":"open-isns-discoveryd"},{"binary_name":"open-isns-server","binary_version":"0.97-3"},{"binary_version":"0.97-3","binary_name":"open-isns-utils"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55995.json"}},{"package":{"name":"open-iscsi","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/open-iscsi?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.4-0ubuntu1","2.1.4-0ubuntu2","2.1.4-0ubuntu3","2.1.4-0ubuntu4","2.1.5-1ubuntu1","2.1.5-1ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"iscsiuio","binary_version":"2.1.5-1ubuntu1.1"},{"binary_vers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