mm/zone_device: do not touch device folio after calling ->folio_free()

{
  "id": "96d228fbf9a0601fe157085e885a1890f9e6a2ca5bbd9b281785016c98b6b58f",
  "url": "https://osv.dev/vulnerability/CVE-2026-46277",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mm/zone_device: do not touch device folio after calling ->folio_free()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mm/zone_device: do not touch device folio after calling ->folio_free() The contents of a device folio can immediately change after calling ->folio_free(), as the folio may be reallocated by a driver with a different order. Instead of touching the folio again to extract the pgmap, use the local stack variable when calling percpu_ref_put_many().",
    "evidence": "osv:CVE-2026-46277",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.0.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-46277",
      "aliases": [
        "CVE-2026-46277"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d245f9b4ab806733a77e51a218ca7b8bc3135cd9"
                },
                {
                  "fixed": "85be0a262e39c706edb53c88af8afde2e98222ba"
                },
                {
                  "fixed": "39928984956037cabd304321cb8f342e47421db5"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46277.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46277.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.640561841Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/39928984956037cabd304321cb8f342e47421db5",
        "https://git.kernel.org/stable/c/85be0a262e39c706edb53c88af8afde2e98222ba",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46277.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-46277",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46277.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-46277",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521063,
  "published_at": "2026-06-08T15:41:19.76+00:00"
}