{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "f1e12d81f9cd250e722da01c7670b518d4181406"
            },
            {
              "fixed": "a9451bf561232314755baf69a5916e0ac77f33fc"
            },
            {
              "fixed": "34f4d0e4e5065237d15651df759a99e81b7f9f51"
            },
            {
              "fixed": "612ddab8fce04394bd7aebe8e0f2599642e30859"
            },
            {
              "fixed": "e4865a56d013e86e46ea6acea15bb6eae01898ff"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6.145"
            },
            {
              "fixed": "6.12.97"
            },
            {
              "fixed": "6.18.40"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64227.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: driver: Check ACPI_COMPANION() against NULL during probe\n\nSince every platform driver can be forced to match a device that doesn't\nmatch its list of device IDs because of device_match_driver_override(),\nplatform drivers that rely on the existence of a device's ACPI companion\nobject should verify its presence.\n\nAccordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks\nagainst NULL to 13 platform drivers handling core ACPI devices.\n\nAlso change the value returned by the ACPI thermal zone driver when\nthe device's ACPI companion is not present to -ENODEV for consistency\nwith the other drivers.",
  "id": "CVE-2026-64227",
  "modified": "2026-07-27T03:56:41.588529597Z",
  "published": "2026-07-24T15:23:10.936Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64227.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64227"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "ACPI: driver: Check ACPI_COMPANION() against NULL during probe"
}