{"id":"USN-8705-2","summary":"zfs-linux vulnerability","details":"USN-8705-1 fixed vulnerabilities in OpenZFS. This update provides the\ncorresponding fix for OpenZFS on Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\nIt was discovered that OpenZFS incorrectly handled authorization checks for\ncertain ioctl operations on Linux. A local attacker could possibly use this\nissue to perform pool-administrative operations or access privileged\ninformation, resulting in an authorization bypass.\n","modified":"2026-09-01T09:56:15.947671794Z","published":"2026-08-31T21:36:58Z","related":["UBUNTU-CVE-2026-79619"],"upstream":["CVE-2026-79619","UBUNTU-CVE-2026-79619"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8705-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-79619"}],"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_version":"0.7.5-1ubuntu16.12+esm1","binary_name":"libuutil1linux"},{"binary_version":"0.7.5-1ubuntu16.12+esm1","binary_name":"libzfs2linux"},{"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_name":"zfs-initramfs","binary_version":"0.7.5-1ubuntu16.12+esm1"},{"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"},"database_specific":{"cves_map":{"cves":[{"severity":[{"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":"CVSS_V4"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2026-79619"}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8705-2.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":{"binaries":[{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"libnvpair1linux"},{"binary_name":"libuutil1linux","binary_version":"0.8.3-1ubuntu12.18+esm1"},{"binary_name":"libzfs2linux","binary_version":"0.8.3-1ubuntu12.18+esm1"},{"binary_name":"libzpool2linux","binary_version":"0.8.3-1ubuntu12.18+esm1"},{"binary_name":"python3-pyzfs","binary_version":"0.8.3-1ubuntu12.18+esm1"},{"binary_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"spl"},{"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_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"zfs-initramfs"},{"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_version":"0.8.3-1ubuntu12.18+esm1","binary_name":"zfsutils-linux"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8705-2.json","cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"id":"CVE-2026-79619","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"}]}]}}}],"schema_version":"1.9.0"}