FKIE_CVE-2026-9639

Vulnerability from fkie_nvd - Published: 2026-06-26 16:16 - Updated: 2026-07-02 13:47
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
security@ubuntu.comhttps://github.com/canonical/lxd/pull/18320Issue Tracking, Patch
security@ubuntu.comhttps://github.com/canonical/lxd/pull/18390Issue Tracking, Patch
security@ubuntu.comhttps://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8Exploit, Patch, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8Exploit, Patch, Vendor Advisory
Impacted products
Vendor Product Version
canonical lxd *
canonical lxd *
linux linux_kernel -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "LXD",
          "platforms": [
            "Linux"
          ],
          "product": "LXD",
          "repo": "https://github.com/canonical/lxd",
          "vendor": "Canonical",
          "versions": [
            {
              "lessThan": "5.21.5",
              "status": "affected",
              "version": "5.21.0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.9",
              "status": "affected",
              "version": "6.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@ubuntu.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "39995265-6759-42FE-BBAD-9062C9928A9B",
              "versionEndExcluding": "5.21.5",
              "versionStartIncluding": "5.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C25E18E8-CDDF-4F3A-A80E-F27456981A4B",
              "versionEndExcluding": "6.9",
              "versionStartIncluding": "6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
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              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-9639",
  "lastModified": "2026-07-02T13:47:00.747",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security@ubuntu.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
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              "exploitation": "poc"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-26T16:01:50.334142Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-26T16:16:37.143",
  "references": [
    {
      "source": "security@ubuntu.com",
      "tags": [
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        "Patch"
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  ],
  "sourceIdentifier": "security@ubuntu.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "security@ubuntu.com",
      "type": "Secondary"
    }
  ]
}



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