{"id":"UBUNTU-CVE-2026-79619","details":"On Linux, several OpenZFS ioctl authorization checks accept a capability held only within a user-created, unprivileged namespace as equivalent to real host privilege, allowing an unprivileged local user to perform operations that should require root. Affected operations include pool-administrative operations (eg create, import, destroy), pool event log access (zpool events) and fault injection (zinject). Exploiting the problem requires only that the local user is permitted to open /dev/zfs (governed by local device permissions) and that the kernel permits unprivileged user namespace creation. No prior access to the target pool or its underlying devices is needed.","modified":"2026-09-01T09:55:50.258886643Z","published":"2026-08-27T00:00:00Z","related":["USN-8705-1","USN-8705-2"],"upstream":["CVE-2026-79619"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-79619"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-79619"},{"type":"REPORT","url":"https://github.com/advisories/GHSA-mhf5-q8gw-qg9v"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2026/08/16/5"},{"type":"REPORT","url":"https://github.com/openzfs/zfs/pull/18959"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8705-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8705-2"}],"affected":[{"package":{"name":"zfs-linux","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/zfs-linux?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-1ubuntu16.12+esm1"}]}],"versions":["0.6.5.11-1ubuntu3","0.6.5.11-1ubuntu4","0.6.5.11-1ubuntu5","0.6.5.11-1ubuntu6","0.7.5-1ubuntu2","0.7.5-1ubuntu3","0.7.5-1ubuntu4","0.7.5-1ubuntu5","0.7.5-1ubuntu6","0.7.5-1ubuntu7","0.7.5-1ubuntu8","0.7.5-1ubuntu9","0.7.5-1ubuntu10","0.7.5-1ubuntu11","0.7.5-1ubuntu12","0.7.5-1ubuntu13","0.7.5-1ubuntu14","0.7.5-1ubuntu15","0.7.5-1ubuntu16","0.7.5-1ubuntu16.2","0.7.5-1ubuntu16.3","0.7.5-1ubuntu16.4","0.7.5-1ubuntu16.6","0.7.5-1ubuntu16.7","0.7.5-1ubuntu16.8","0.7.5-1ubuntu16.9","0.7.5-1ubuntu16.10","0.7.5-1ubuntu16.11","0.7.5-1ubuntu16.12"],"ecosystem_specific":{"binaries":[{"binary_version":"0.7.5-1ubuntu16.12+esm1","binary_name":"libnvpair1linux"},{"binary_name":"libuutil1linux","binary_version":"0.7.5-1ubuntu16.12+esm1"},{"binary_name":"libzfs2linux","binary_version":"0.7.5-1ubuntu16.12+esm1"},{"binary_name":"libzpool2linux","binary_version":"0.7.5-1ubuntu16.12+esm1"},{"binary_name":"zfs-dkms","binary_version":"0.7.5-1ubuntu16.12+esm1"},{"binary_name":"zfs-dracut","binary_version":"0.7.5-1ubuntu16.12+esm1"},{"binary_version":"0.7.5-1ubuntu16.12+esm1","binary_name":"zfs-initramfs"},{"binary_name":"zfs-test","binary_version":"0.7.5-1ubuntu16.12+esm1"},{"binary_name":"zfs-zed","binary_version":"0.7.5-1ubuntu16.12+esm1"},{"binary_name":"zfsutils-linux","binary_version":"0.7.5-1ubuntu16.12+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","priority_reason":"See ubuntu cvss score"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"}},{"package":{"name":"zfs-linux","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/zfs-linux?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.3-1ubuntu12.18+esm1"}]}],"versions":["0.8.1-1ubuntu14","0.8.1-1ubuntu15","0.8.1-1ubuntu16","0.8.1-1ubuntu17","0.8.2-3ubuntu1","0.8.2-3ubuntu2","0.8.2-3ubuntu3","0.8.2-3ubuntu4","0.8.2-3ubuntu5","0.8.3-1ubuntu2","0.8.3-1ubuntu3","0.8.3-1ubuntu4","0.8.3-1ubuntu5","0.8.3-1ubuntu6","0.8.3-1ubuntu7","0.8.3-1ubuntu8","0.8.3-1ubuntu9","0.8.3-1ubuntu10","0.8.3-1ubuntu11","0.8.3-1ubuntu12","0.8.3-1ubuntu12.1","0.8.3-1ubuntu12.2","0.8.3-1ubuntu12.3","0.8.3-1ubuntu12.4","0.8.3-1ubuntu12.5","0.8.3-1ubuntu12.6","0.8.3-1ubuntu12.7","0.8.3-1ubuntu12.8","0.8.3-1ubuntu12.9","0.8.3-1ubuntu12.10","0.8.3-1ubuntu12.11","0.8.3-1ubuntu12.12","0.8.3-1ubuntu12.13","0.8.3-1ubuntu12.14","0.8.3-1ubuntu12.15","0.8.3-1ubuntu12.16","0.8.3-1ubuntu12.17","0.8.3-1ubuntu12.18"],"ecosystem_specific":{"priority_reason":"See ubuntu cvss score","binaries":[{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"libnvpair1linux"},{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"libuutil1linux"},{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"libzfs2linux"},{"binary_name":"libzpool2linux","binary_version":"0.8.3-1ubuntu12.18+esm1"},{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"python3-pyzfs"},{"binary_name":"spl","binary_version":"0.8.3-1ubuntu12.18+esm1"},{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"spl-dkms"},{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"zfs-dkms"},{"binary_name":"zfs-dracut","binary_version":"0.8.3-1ubuntu12.18+esm1"},{"binary_name":"zfs-initramfs","binary_version":"0.8.3-1ubuntu12.18+esm1"},{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"zfs-test"},{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"zfs-zed"},{"binary_name":"zfsutils-linux","binary_version":"0.8.3-1ubuntu12.18+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"}},{"package":{"name":"zfs-linux","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/zfs-linux?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.5-1ubuntu6~22.04.7"}]}],"versions":["2.0.6-1ubuntu2","2.0.6-1ubuntu3","2.1.2-1ubuntu1","2.1.2-1ubuntu2","2.1.2-1ubuntu3","2.1.4-0ubuntu0.1","2.1.5-1ubuntu6~22.04.1","2.1.5-1ubuntu6~22.04.2","2.1.5-1ubuntu6~22.04.3","2.1.5-1ubuntu6~22.04.4","2.1.5-1ubuntu6~22.04.5","2.1.5-1ubuntu6~22.04.6"],"ecosystem_specific":{"binaries":[{"binary_name":"libnvpair3linux","binary_version":"2.1.5-1ubuntu6~22.04.7"},{"binary_version":"2.1.5-1ubuntu6~22.04.7","binary_name":"libpam-zfs"},{"binary_name":"libuutil3linux","binary_version":"2.1.5-1ubuntu6~22.04.7"},{"binary_name":"libzfs4linux","binary_version":"2.1.5-1ubuntu6~22.04.7"},{"binary_name":"libzfsbootenv1linux","binary_version":"2.1.5-1ubuntu6~22.04.7"},{"binary_name":"libzpool5linux","binary_version":"2.1.5-1ubuntu6~22.04.7"},{"binary_name":"python3-pyzfs","binary_version":"2.1.5-1ubuntu6~22.04.7"},{"binary_name":"zfs-dkms","binary_version":"2.1.5-1ubuntu6~22.04.7"},{"binary_version":"2.1.5-1ubuntu6~22.04.7","binary_name":"zfs-dracut"},{"binary_version":"2.1.5-1ubuntu6~22.04.7","binary_name":"zfs-initramfs"},{"binary_name":"zfs-test","binary_version":"2.1.5-1ubuntu6~22.04.7"},{"binary_version":"2.1.5-1ubuntu6~22.04.7","binary_name":"zfs-zed"},{"binary_version":"2.1.5-1ubuntu6~22.04.7","binary_name":"zfsutils-linux"}],"availability":"No subscription required","priority_reason":"See ubuntu cvss score"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"}},{"package":{"name":"zfs-linux","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/zfs-linux?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.2-0ubuntu9.5"}]}],"versions":["2.2.0~rc3-0ubuntu4","2.2.0-0ubuntu1","2.2.0-0ubuntu3","2.2.1-0ubuntu1","2.2.2-0ubuntu1","2.2.2-0ubuntu2","2.2.2-0ubuntu3","2.2.2-0ubuntu4","2.2.2-0ubuntu7","2.2.2-0ubuntu8","2.2.2-0ubuntu9","2.2.2-0ubuntu9.1","2.2.2-0ubuntu9.2","2.2.2-0ubuntu9.3","2.2.2-0ubuntu9.4"],"ecosystem_specific":{"availability":"No subscription required","priority_reason":"See ubuntu cvss score","binaries":[{"binary_version":"2.2.2-0ubuntu9.5","binary_name":"libnvpair3linux"},{"binary_name":"libpam-zfs","binary_version":"2.2.2-0ubuntu9.5"},{"binary_version":"2.2.2-0ubuntu9.5","binary_name":"libuutil3linux"},{"binary_version":"2.2.2-0ubuntu9.5","binary_name":"libzfs4linux"},{"binary_version":"2.2.2-0ubuntu9.5","binary_name":"libzfsbootenv1linux"},{"binary_version":"2.2.2-0ubuntu9.5","binary_name":"libzpool5linux"},{"binary_version":"2.2.2-0ubuntu9.5","binary_name":"python3-pyzfs"},{"binary_name":"zfs-dkms","binary_version":"2.2.2-0ubuntu9.5"},{"binary_name":"zfs-dracut","binary_version":"2.2.2-0ubuntu9.5"},{"binary_name":"zfs-initramfs","binary_version":"2.2.2-0ubuntu9.5"},{"binary_name":"zfs-test","binary_version":"2.2.2-0ubuntu9.5"},{"binary_name":"zfs-zed","binary_version":"2.2.2-0ubuntu9.5"},{"binary_name":"zfsutils-linux","binary_version":"2.2.2-0ubuntu9.5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"}},{"package":{"name":"zfs-linux","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/zfs-linux?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.1-1ubuntu5.1"}]}],"versions":["2.3.4-1ubuntu2","2.3.5-1ubuntu1","2.3.5-1ubuntu2","2.4.0-1ubuntu2","2.4.0-1ubuntu3","2.4.0-1ubuntu4","2.4.1-1ubuntu1","2.4.1-1ubuntu2","2.4.1-1ubuntu3","2.4.1-1ubuntu4","2.4.1-1ubuntu5"],"ecosystem_specific":{"availability":"No subscription required","priority_reason":"See ubuntu cvss score","binaries":[{"binary_name":"libnvpair3linux","binary_version":"2.4.1-1ubuntu5.1"},{"binary_version":"2.4.1-1ubuntu5.1","binary_name":"libpam-zfs"},{"binary_name":"libuutil3linux","binary_version":"2.4.1-1ubuntu5.1"},{"binary_version":"2.4.1-1ubuntu5.1","binary_name":"libzfs7linux"},{"binary_name":"libzfsbootenv1linux","binary_version":"2.4.1-1ubuntu5.1"},{"binary_version":"2.4.1-1ubuntu5.1","binary_name":"libzpool7linux"},{"binary_version":"2.4.1-1ubuntu5.1","binary_name":"python3-pyzfs"},{"binary_name":"zfs-dkms","binary_version":"2.4.1-1ubuntu5.1"},{"binary_name":"zfs-dracut","binary_version":"2.4.1-1ubuntu5.1"},{"binary_version":"2.4.1-1ubuntu5.1","binary_name":"zfs-initramfs"},{"binary_version":"2.4.1-1ubuntu5.1","binary_name":"zfs-test"},{"binary_name":"zfs-zed","binary_version":"2.4.1-1ubuntu5.1"},{"binary_version":"2.4.1-1ubuntu5.1","binary_name":"zfsutils-linux"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"high"}]}