libvirt — security advisory

{
  "id": "07f593bb4a2de065adee056fb6ec56723248848bbcc7b8893b267f31fb82eaf3",
  "url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-25637",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ALPINE-CVE-2020-25637",
    "summary": "A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
    "evidence": "osv:ALPINE-CVE-2020-25637",
    "products": [
      {
        "name": {
          "value": "libvirt",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.0-r3",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "ALPINE-CVE-2020-25637",
      "aliases": [
        "ALPINE-CVE-2020-25637"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6.6.0-r3"
                }
              ]
            }
          ],
          "package": {
            "name": "libvirt",
            "purl": "pkg:apk/alpine/libvirt?arch=source",
            "ecosystem": "Alpine:v3.12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-25637.json"
          },
          "ecosystem_specific": {}
        }
      ],
      "modified": "2026-10-26T11:17:55.154384818Z",
      "provider": "osv",
      "upstream": [
        "CVE-2020-25637"
      ],
      "references": [
        "https://security.alpinelinux.org/vuln/CVE-2020-25637"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2020-25637",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 450542,
  "published_at": "2020-10-06T14:15:12.527+00:00"
}