{"id":"UBUNTU-CVE-2026-16445","details":"A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP options, such as a malicious root-path, next-server, or bootfile name, to a system using dracut's NetworkManager-based initrd network module. These options are improperly handled and written into a temporary shell script without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs during system boot.","modified":"2026-09-28T22:45:15.073707639Z","published":"2026-07-21T13:17:00Z","related":["USN-8828-1"],"upstream":["CVE-2026-16445"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-16445"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-16445"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2459963"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8828-1"}],"affected":[{"package":{"name":"dracut","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/dracut?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"051-1ubuntu0.1~esm1"}]}],"versions":["051-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"051-1ubuntu0.1~esm1","binary_name":"dracut"},{"binary_name":"dracut-config-generic","binary_version":"051-1ubuntu0.1~esm1"},{"binary_name":"dracut-config-rescue","binary_version":"051-1ubuntu0.1~esm1"},{"binary_version":"051-1ubuntu0.1~esm1","binary_name":"dracut-core"},{"binary_name":"dracut-live","binary_version":"051-1ubuntu0.1~esm1"},{"binary_name":"dracut-network","binary_version":"051-1ubuntu0.1~esm1"},{"binary_name":"dracut-squash","binary_version":"051-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16445.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}