{"id":"UBUNTU-CVE-2019-3840","details":"A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 in the way it gets interface information through the QEMU agent. An attacker in a guest VM can use this flaw to crash libvirtd and cause a denial of service.","modified":"2026-04-22T11:57:03.183344Z","published":"2019-02-27T00:00:00Z","related":["USN-3909-1"],"upstream":["CVE-2019-3840"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-3840"},{"type":"REPORT","url":"https://www.redhat.com/archives/libvir-list/2019-January/msg00241.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3909-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-3840"}],"affected":[{"package":{"name":"libvirt","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libvirt@1.3.1-1ubuntu10.25?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.1-1ubuntu10.25"}]}],"versions":["1.2.16-2ubuntu11","1.2.16-2ubuntu12","1.2.16-2ubuntu13","1.2.16-2ubuntu14","1.2.21-2ubuntu1","1.2.21-2ubuntu3","1.2.21-2ubuntu4","1.2.21-2ubuntu5","1.2.21-2ubuntu7","1.2.21-2ubuntu8","1.2.21-2ubuntu9","1.2.21-2ubuntu10","1.3.1-1ubuntu1","1.3.1-1ubuntu2","1.3.1-1ubuntu3","1.3.1-1ubuntu4","1.3.1-1ubuntu6","1.3.1-1ubuntu9","1.3.1-1ubuntu10","1.3.1-1ubuntu10.1","1.3.1-1ubuntu10.2","1.3.1-1ubuntu10.3","1.3.1-1ubuntu10.5","1.3.1-1ubuntu10.6","1.3.1-1ubuntu10.7","1.3.1-1ubuntu10.8","1.3.1-1ubuntu10.10","1.3.1-1ubuntu10.11","1.3.1-1ubuntu10.12","1.3.1-1ubuntu10.13","1.3.1-1ubuntu10.14","1.3.1-1ubuntu10.15","1.3.1-1ubuntu10.17","1.3.1-1ubuntu10.18","1.3.1-1ubuntu10.19","1.3.1-1ubuntu10.21","1.3.1-1ubuntu10.22","1.3.1-1ubuntu10.23","1.3.1-1ubuntu10.24"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.3.1-1ubuntu10.25","binary_name":"libvirt-bin"},{"binary_version":"1.3.1-1ubuntu10.25","binary_name":"libvirt0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-3840.json"}},{"package":{"name":"libvirt","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libvirt@4.0.0-1ubuntu8.8?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.0-1ubuntu8.8"}]}],"versions":["3.6.0-1ubuntu5","3.6.0-1ubuntu6","4.0.0-1ubuntu1","4.0.0-1ubuntu2","4.0.0-1ubuntu3","4.0.0-1ubuntu4","4.0.0-1ubuntu5","4.0.0-1ubuntu6","4.0.0-1ubuntu7","4.0.0-1ubuntu8","4.0.0-1ubuntu8.1","4.0.0-1ubuntu8.2","4.0.0-1ubuntu8.3","4.0.0-1ubuntu8.4","4.0.0-1ubuntu8.5","4.0.0-1ubuntu8.6","4.0.0-1ubuntu8.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libnss-libvirt"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-bin"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-clients"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-daemon"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-daemon-driver-storage-gluster"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-daemon-driver-storage-rbd"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-daemon-driver-storage-sheepdog"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-daemon-driver-storage-zfs"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-daemon-system"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-sanlock"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt-wireshark"},{"binary_version":"4.0.0-1ubuntu8.8","binary_name":"libvirt0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-3840.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}