libxml2: Use after free in xmlParseInternalSubset via improper entity resolution handling

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-6653",
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "dateUpdated": "2026-06-22T15:51:11.554Z",
    "dateReserved": "2026-04-20T06:37:45.271Z",
    "datePublished": "2026-06-22T12:40:31.424Z",
    "state": "PUBLISHED"
  },
  "containers": {
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        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical",
        "dateUpdated": "2026-06-22T12:40:31.424Z"
      },
      "title": "libxml2: Use after free in xmlParseInternalSubset via improper entity resolution handling",
      "descriptions": [
        {
          "lang": "en",
          "value": "Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling."
        }
      ],
      "affected": [
        {
          "vendor": "GNOME",
          "product": "libxml2",
          "packageName": "libxml2",
          "repo": "https://gitlab.gnome.org/GNOME/libxml2",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.9.11",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "2.11.0"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-416 Use after free",
              "cweId": "CWE-416",
              "type": "CWE"
            },
            {
              "lang": "en",
              "description": "CWE-611 Improper Restriction of XML External Entity Processing",
              "cweId": "CWE-611",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/2141260",
          "tags": [
            "issue-tracking"
          ]
        },
        {
          "url": "https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058",
          "tags": [
            "issue-tracking"
          ]
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-242",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-242 Code Injection"
            }
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to libxml2 version 2.11.0 or later"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Geoffrey Humphreys",
          "type": "finder"
        }
      ]
    },
    "adp": [
      {
        "providerMetadata": {
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP",
          "dateUpdated": "2026-06-22T15:51:11.554Z"
        },
        "title": "CISA ADP Vulnrichment",
        "metrics": [
          {}
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      }
    ]
  }
}