{"id":"CVE-2026-34177","summary":"VM lowlevel restriction bypass via raw.apparmor and raw.qemu.conf","details":"Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root.","aliases":["GHSA-fm2x-c5qw-4h6f"],"modified":"2026-07-15T01:49:15.073689834Z","published":"2026-04-09T09:15:27.532Z","database_specific":{"cna_assigner":"canonical","cwe_ids":["CWE-184"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34177.json","unresolved_ranges":[{"extracted_events":[{"introduced":"6.0.0"},{"fixed":"6.8.0"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"WEB","url":"https://github.com/canonical"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34177.json"},{"type":"ADVISORY","url":"https://github.com/canonical/lxd/security/advisories/GHSA-fm2x-c5qw-4h6f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34177"},{"type":"FIX","url":"https://github.com/canonical/lxd/pull/17909"},{"type":"PACKAGE","url":"https://github.com/canonical/lxd"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/canonical/lxd","events":[{"introduced":"0"},{"fixed":"7b1f0b6acefa288398ead8dda48b046d7b2795a3"},{"fixed":"28f4061af24739ae06b678c53f155c6c02357c92"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"4.12.0"},{"fixed":"5.0.7"},{"introduced":"5.1.0"},{"fixed":"5.21.5"}]}}],"versions":["lxd-5.0.2","lxd-5.0.1","lxd-5.0.0","lxd-4.24","lxd-4.23","lxd-4.22","lxd-4.21","lxd-4.20","lxd-4.19","lxd-4.18","lxd-4.17","lxd-4.16","lxd-4.15","lxd-4.14","lxd-4.13","lxd-4.12","lxd-4.11","lxd-4.10","lxd-4.9","lxd-4.8","lxd-4.7","lxd-4.6","lxd-4.5","lxd-4.4","lxd-4.3","lxd-4.2","lxd-4.1","lxd-4.0.0","lxd-3.23","lxd-3.22","lxd-3.21","lxd-3.20","lxd-3.19","lxd-3.18","lxd-3.17","lxd-3.16","lxd-3.15","lxd-3.14","lxd-3.13","lxd-3.12","lxd-3.11","lxd-3.10","lxd-3.9","lxd-3.8","lxd-3.7","lxd-3.6","lxd-3.5","lxd-3.4","lxd-3.3","lxd-3.2","lxd-3.1","lxd-3.0.0","lxd-3.0.0.beta7","lxd-3.0.0.beta6","lxd-3.0.0.beta5","lxd-3.0.0.beta4","lxd-3.0.0.beta3","lxd-3.0.0.beta2","lxd-3.0.0.beta1","lxd-2.21","lxd-2.20","lxd-2.19","lxd-2.18","lxd-2.17","lxd-2.16","lxd-2.15","lxd-2.14","lxd-2.13","lxd-2.12","lxd-2.11","lxd-2.10.1","lxd-2.10","lxd-2.9.3","lxd-2.9.2","lxd-2.9.1","lxd-2.9","lxd-2.8","lxd-2.7","lxd-2.6.2","lxd-2.6.1","lxd-2.6","lxd-2.5","lxd-2.4.1","lxd-2.4","lxd-2.3","lxd-2.2","lxd-2.1","lxd-2.0.0","lxd-2.0.0.rc9","lxd-2.0.0.rc8","lxd-2.0.0.rc7","lxd-2.0.0.rc6","lxd-2.0.0.rc5","lxd-2.0.0.rc4","lxd-2.0.0.rc3","lxd-2.0.0.rc2","lxd-2.0.0.rc1","lxd-2.0.0.beta4","lxd-2.0.0.beta3","lxd-2.0.0.beta2","lxd-2.0.0.beta1","lxd-0.27","lxd-0.26","lxd-0.25","lxd-0.24","lxd-0.23","lxd-0.22","lxd-0.21","lxd-0.20","lxd-0.19","lxd-0.18","lxd-0.17","lxd-0.16","lxd-0.15","lxd-0.14","lxd-0.13","lxd-0.12","lxd-0.11","lxd-0.10","lxd-0.9","lxd-0.8.1","lxd-0.8","lxd-0.7","lxd-0.6","lxd-0.5","lxd-0.4","lxd-0.3","lxd-0.2","lxd-0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34177.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"}]}