CVE-2026-85185

{
  "etk_id": "ETK-2026-3103",
  "cve_id": "CVE-2026-85185",
  "display_id": "CVE-2026-85185",
  "ghsa_id": "GHSA-27q7-qwhm-c34p",
  "euvd_id": "EUVD-2026-88258",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Path traversal in LXD btrfs storage handling",
  "summary": "LXD btrfs storage handling does not adequately confine subvolume paths supplied during optimized backup restoration or migration receipt. A project user permitted to create instances can cause root-privileged deletion outside the storage pool, and hosts with a btrfs root filesystem may also be exposed to attacker-controlled file placement.",
  "mitigation": "Upgrade github.com/canonical/lxd to 4.0.14, 5.0.10, 5.21.8, 6.9-bf243da, 6.10 or later.",
  "vendor": "go",
  "product": "go:github.com/canonical/lxd",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.0.2"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "4.0.14",
        "5.0.10",
        "5.21.8",
        "6.9-bf243da",
        "6.10"
      ],
      "package_name": "github.com/canonical/lxd",
      "purl": "pkg:golang/github.com/canonical/lxd"
    }
  ],
  "cwes": [
    22
  ],
  "cvss_score": 9.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 59.15802228333333,
  "t0_at": "2026-09-28T13:21:51.596000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-09-25T11:08:16+00:00",
      "days": -3.092773101851852,
      "is_lower_bound": false,
      "measured_at": "2026-09-28T13:21:51.596000+00:00",
      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-27q7-qwhm-c34p"
    },
    "trigger_signal": {
      "at": "2026-09-28T13:21:51.596000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-28T13:21:51.596000+00:00",
      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-27q7-qwhm-c34p"
    }
  }
}