{"id":"CVE-2026-9640","title":"A privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.","summary":"A privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.. An authenticated project operator i…","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-863"],"vendor":"canonical","product":"lxd","affected":["lxd >= 4.12, < 5.0.7","lxd >= 5.21.0, < 5.21.5","lxd >= 6.0, < 6.9"],"patched":["lxd 6.9"],"published":"2026-06-26","updated":"2026-07-02","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-9640","references":[{"url":"https://github.com/canonical/lxd/pull/18301","label":"security@ubuntu.com"},{"url":"https://github.com/canonical/lxd/pull/18303","label":"security@ubuntu.com"},{"url":"https://github.com/canonical/lxd/pull/18304","label":"security@ubuntu.com"},{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552","label":"security@ubuntu.com"},{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00632,"epssPercentile":0.48605,"ingestedAt":"2026-07-03T13:02:28.086Z","slug":"CVE-2026-9640","body":"## Overview\n\nA privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.. An authenticated project operator in a restricted multi-tenant environment can bypass policy restrictions by importing a maliciously crafted instance backup containing restricted configuration keys within a snapshot. When the snapshot is restored, these restricted keys are applied to the live instance without policy validation. Starting the modified instance grants the operator unauthorized host root access.\n\n## Affected\n\n- `lxd >= 4.12, < 5.0.7`\n- `lxd >= 5.21.0, < 5.21.5`\n- `lxd >= 6.0, < 6.9`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `lxd 6.9`","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":39.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}