linux-microvm-7.3 — security advisory

{
  "id": "a6748568353c6c025a0f8ff0ad3b30dc0d3b5a98f9174d0d50c34893e1ca1fcd",
  "url": "https://osv.dev/vulnerability/CGA-cj8v-gj9g-3875",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CGA-cj8v-gj9g-3875",
    "summary": "CGA-cj8v-gj9g-3875",
    "evidence": "osv:CGA-cj8v-gj9g-3875",
    "products": [
      {
        "name": {
          "value": "linux-microvm-7.3",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CGA-cj8v-gj9g-3875",
      "aliases": [
        "CGA-cj8v-gj9g-3875"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "linux-microvm-7.3",
            "purl": "pkg:apk/chainguard/linux-microvm-7.3?arch=x86_64",
            "ecosystem": "Chainguard"
          },
          "database_specific": {
            "source": "https://advisories.cgr.dev/chainguard/v3/osv/CGA-cj8v-gj9g-3875.json",
            "chainguard": {
              "applies_to_subpackages": false
            }
          },
          "ecosystem_specific": {
            "components": [
              {
                "component_name": "linux-microvm-7.3",
                "component_purl": "pkg:apk/linux-microvm-7.3@7.3.0-r0",
                "component_type": "apk",
                "component_version": "7.3.0-r0",
                "component_location": "/.PKGINFO",
                "latest_event_status": "detection",
                "latest_event_timestamp": "2026-10-26T14:04:02Z"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-26T19:45:43.414774422Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-3564",
        "GHSA-x4rf-jx7j-r49m"
      ],
      "references": [
        "https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html",
        "https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1964139",
        "https://www.openwall.com/lists/oss-security/2021/05/25/1"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2021-3564",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 458401,
  "published_at": "2026-10-26T14:04:02+00:00"
}