Authenticated Denial of Service via Malicious Backup Tarball in LXD_CVE-2026-9639

{
    "lastseen": "",
    "description": "Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field.",
    "published": "2026-06-26T15:39:04.696Z",
    "modified": "2026-06-26T16:02:11.520Z",
    "type": "cve",
    "title": "Authenticated Denial of Service via Malicious Backup Tarball in LXD",
    "source": "canonical",
    "references": "https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8\nhttps://github.com/canonical/lxd/pull/18320\nhttps://github.com/canonical/lxd/pull/18390",
    "id": "CVE-2026-9639",
    "bulletinFamily": "",
    "cwe": [
        "CWE-476"
    ],
    "cvelist": null,
    "sourceData": "Canonical LXD 5.21.0\nCanonical LXD 6.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "LXD",
    "version": "5.21.0",
    "vendor": "Canonical",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}