{"id":"UBUNTU-CVE-2026-3408","details":"A vulnerability was identified in Open Babel up to 3.1.1. This impacts the function OBAtom::GetExplicitValence of the file isrc/atom.cpp of the component CDXML File Handler. Such manipulation leads to null pointer dereference. The attack can be launched remotely. The exploit is publicly available and might be used. The name of the patch is e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a. It is best practice to apply a patch to resolve this issue.","modified":"2026-05-20T16:25:32.989017070Z","published":"2026-03-02T04:16:00Z","upstream":["CVE-2026-3408"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-3408"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-3408"},{"type":"REPORT","url":"https://github.com/openbabel/openbabel/issues/2848"},{"type":"REPORT","url":"https://github.com/openbabel/openbabel/pull/2862"},{"type":"REPORT","url":"https://github.com/VedantMadane/openbabel/commit/e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a"},{"type":"REPORT","url":"https://github.com/oneafter/0128/blob/main/ob3/repro.cdxml"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.348303"},{"type":"REPORT","url":"https://vuldb.com/?id.348303"},{"type":"REPORT","url":"https://vuldb.com/?submit.763756"}],"affected":[{"package":{"name":"openbabel","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/openbabel?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.2+dfsg-2.2","2.3.2+dfsg-2.2build1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.2+dfsg-2.2build1","binary_name":"libchemistry-openbabel-perl"},{"binary_name":"libopenbabel4v5","binary_version":"2.3.2+dfsg-2.2build1"},{"binary_version":"2.3.2+dfsg-2.2build1","binary_name":"openbabel"},{"binary_name":"openbabel-gui","binary_version":"2.3.2+dfsg-2.2build1"},{"binary_name":"python-openbabel","binary_version":"2.3.2+dfsg-2.2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3408.json"}},{"package":{"name":"openbabel","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/openbabel?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.2+dfsg-3build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libchemistry-openbabel-perl","binary_version":"2.3.2+dfsg-3build1"},{"binary_name":"libopenbabel4v5","binary_version":"2.3.2+dfsg-3build1"},{"binary_version":"2.3.2+dfsg-3build1","binary_name":"openbabel"},{"binary_name":"openbabel-gui","binary_version":"2.3.2+dfsg-3build1"},{"binary_name":"python-openbabel","binary_version":"2.3.2+dfsg-3build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3408.json"}},{"package":{"name":"openbabel","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/openbabel?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.1+dfsg-3","2.4.1+dfsg-3build1","2.4.1+dfsg-5.1","2.4.1+dfsg-6","3.0.0+dfsg-3","3.0.0+dfsg-3ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_name":"libchemistry-openbabel-perl","binary_version":"3.0.0+dfsg-3ubuntu3"},{"binary_version":"3.0.0+dfsg-3ubuntu3","binary_name":"libopenbabel6"},{"binary_version":"3.0.0+dfsg-3ubuntu3","binary_name":"openbabel"},{"binary_version":"3.0.0+dfsg-3ubuntu3","binary_name":"openbabel-gui"},{"binary_name":"python3-openbabel","binary_version":"3.0.0+dfsg-3ubuntu3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3408.json"}},{"package":{"name":"openbabel","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/openbabel?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.1+dfsg-6ubuntu1","3.1.1+dfsg-6ubuntu5"],"ecosystem_specific":{"binaries":[{"binary_name":"libchemistry-openbabel-perl","binary_version":"3.1.1+dfsg-6ubuntu5"},{"binary_name":"libopenbabel7","binary_version":"3.1.1+dfsg-6ubuntu5"},{"binary_name":"openbabel","binary_version":"3.1.1+dfsg-6ubuntu5"},{"binary_name":"openbabel-gui","binary_version":"3.1.1+dfsg-6ubuntu5"},{"binary_name":"python3-openbabel","binary_version":"3.1.1+dfsg-6ubuntu5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3408.json"}},{"package":{"name":"openbabel","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/openbabel?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.1+dfsg-9build2","3.1.1+dfsg-9ubuntu1","3.1.1+dfsg-9ubuntu2","3.1.1+dfsg-9ubuntu4","3.1.1+dfsg-9ubuntu5"],"ecosystem_specific":{"binaries":[{"binary_version":"3.1.1+dfsg-9ubuntu5","binary_name":"libchemistry-openbabel-perl"},{"binary_name":"libopenbabel7","binary_version":"3.1.1+dfsg-9ubuntu5"},{"binary_name":"openbabel","binary_version":"3.1.1+dfsg-9ubuntu5"},{"binary_name":"openbabel-gui","binary_version":"3.1.1+dfsg-9ubuntu5"},{"binary_name":"python3-openbabel","binary_version":"3.1.1+dfsg-9ubuntu5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3408.json"}},{"package":{"name":"openbabel","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/openbabel?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"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