{"id":"UBUNTU-CVE-2026-100890","details":"A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_spf_ipv6_explode in the library libopendmarc/opendmarc_spf.c of the component SPF Parser. This manipulation of the argument cp causes null pointer dereference. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.","modified":"2026-09-30T21:41:53Z","published":"2026-09-28T01:16:00Z","upstream":["CVE-2026-100890"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-100890"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-100890"},{"type":"REPORT","url":"https://weitongli.com/share/opendmarc-ip6-wild-pointer.html"},{"type":"REPORT","url":"https://vuldb.com/cve/CVE-2026-100890"},{"type":"REPORT","url":"https://vuldb.com/submit/917188"},{"type":"REPORT","url":"https://vuldb.com/vuln/410840"},{"type":"REPORT","url":"https://vuldb.com/vuln/410840/cti"}],"affected":[{"package":{"name":"opendmarc","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/opendmarc?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1+dfsg-2","1.3.1+dfsg-3","1.3.1+dfsg-3ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libopendmarc2","binary_version":"1.3.1+dfsg-3ubuntu0.1~esm1"},{"binary_name":"opendmarc","binary_version":"1.3.1+dfsg-3ubuntu0.1~esm1"},{"binary_name":"rddmarc","binary_version":"1.3.1+dfsg-3ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100890.json"}},{"package":{"name":"opendmarc","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/opendmarc?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.2-2","1.3.2-3","1.3.2-3ubuntu0.1","1.3.2-3ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.2-3ubuntu0.2","binary_name":"libopendmarc2"},{"binary_name":"opendmarc","binary_version":"1.3.2-3ubuntu0.2"},{"binary_name":"rddmarc","binary_version":"1.3.2-3ubuntu0.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100890.json"}},{"package":{"name":"opendmarc","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/opendmarc?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.2-6","1.3.2-7","1.3.2-7ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.2-7ubuntu0.1","binary_name":"libopendmarc2"},{"binary_name":"opendmarc","binary_version":"1.3.2-7ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100890.json"}},{"package":{"name":"opendmarc","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/opendmarc?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.0~beta1+dfsg-6","1.4.1.1-1","1.4.1.1-2","1.4.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libopendmarc2","binary_version":"1.4.2-1"},{"binary_name":"opendmarc","binary_version":"1.4.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100890.json"}},{"package":{"name":"opendmarc","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/opendmarc?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.2-3","1.4.2-4","1.4.2-4.1build1","1.4.2-4.1build2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.2-4.1build2","binary_name":"libopendmarc2t64"},{"binary_version":"1.4.2-4.1build2","binary_name":"opendmarc"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100890.json"}},{"package":{"name":"opendmarc","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/opendmarc?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.2-5.1","1.4.2-5.1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libopendmarc2t64","binary_version":"1.4.2-5.1build1"},{"binary_name":"opendmarc","binary_version":"1.4.2-5.1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100890.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}]}