LXD Snapshot Import Privilege Escalation Vulnerability

{
  "id": "212b092ae9d26bd63e76c52d17e64ccb096b9a754033899c684a84bcb9baad0d",
  "url": "https://osv.dev/vulnerability/CVE-2026-9640",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "LXD Snapshot Import Privilege Escalation Vulnerability",
    "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 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.",
    "evidence": "osv:CVE-2026-9640",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-9640",
      "aliases": [
        "CVE-2026-9640",
        "GHSA-ppq7-4492-5552"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/canonical/lxd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "538ac3df036e4a8c0197d0f52d125be1b51879d0"
                },
                {
                  "fixed": "7b1f0b6acefa288398ead8dda48b046d7b2795a3"
                },
                {
                  "introduced": "761d134ceabd306f57acfb0ca51f59b03751a5b0"
                },
                {
                  "fixed": "c5184be310b13a8be5d9a5f286bfa1c0c286716e"
                },
                {
                  "introduced": "0"
                },
                {
                  "fixed": "85f897013ccdb0f8f44d434a3b655d2edcefcfae"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.12"
                      },
                      {
                        "fixed": "5.0.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.21.0"
                      },
                      {
                        "fixed": "5.21.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.0"
                      },
                      {
                        "fixed": "6.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "lxd-6.8",
            "lxd-5.17",
            "lxd-5.16",
            "lxd-5.15",
            "lxd-5.14",
            "lxd-5.13",
            "lxd-5.12",
            "lxd-5.11",
            "lxd-5.0.2",
            "lxd-5.10",
            "lxd-5.9",
            "lxd-5.8",
            "lxd-5.7",
            "lxd-5.6",
            "lxd-5.5",
            "lxd-5.0.1",
            "lxd-5.4",
            "lxd-5.3",
            "lxd-5.2",
            "lxd-5.1",
            "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"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9640.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.622363405Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9640.json",
        "https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-9640",
        "https://github.com/canonical/lxd/pull/18301",
        "https://github.com/canonical/lxd/pull/18303",
        "https://github.com/canonical/lxd/pull/18304",
        "https://github.com/canonical/lxd"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "canonical",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9640.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-9640",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518100,
  "published_at": "2026-06-26T15:50:38.453+00:00"
}