{"id":"UBUNTU-CVE-2026-103679","details":"A flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory management triggers a use-after-free and double-free condition, causing the application to crash and resulting in a Denial of Service (DoS).","modified":"2026-10-02T22:30:16.268425305Z","published":"2026-10-02T00:00:00Z","upstream":["CVE-2026-103679"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-103679"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-103679"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2544477"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-103679"},{"type":"REPORT","url":"https://github.com/verdammelt/tnef"}],"affected":[{"package":{"name":"tnef","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/tnef?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.9-1","1.4.9-1+deb8u2build0.16.04.1","1.4.9-1+deb8u3build0.16.04.1","1.4.9-1+deb8u4build0.16.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.9-1+deb8u4build0.16.04.1","binary_name":"tnef"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"}},{"package":{"name":"tnef","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tnef?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.12-1.2"],"ecosystem_specific":{"binaries":[{"binary_name":"tnef","binary_version":"1.4.12-1.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"}},{"package":{"name":"tnef","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tnef?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.12-1.2","1.4.18-1"],"ecosystem_specific":{"binaries":[{"binary_name":"tnef","binary_version":"1.4.18-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"}},{"package":{"name":"tnef","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/tnef?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-3"],"ecosystem_specific":{"binaries":[{"binary_name":"tnef","binary_version":"1.4.18-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"}},{"package":{"name":"tnef","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/tnef?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.18-3","binary_name":"tnef"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"}},{"package":{"name":"tnef","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tnef?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-5","1.4.18-5build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.18-5build1","binary_name":"tnef"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}