s390/ism: add release function for struct device

{
  "id": "4e822caf65547b6dec5b253244f307dd4e2b470b2eaad9deca132ac2c10ae91d",
  "url": "https://osv.dev/vulnerability/CVE-2025-21856",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "s390/ism: add release function for struct device",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: s390/ism: add release function for struct device According to device_release() in /drivers/base/core.c, a device without a release function is a broken device and must be fixed. The current code directly frees the device after calling device_add() without waiting for other kernel parts to release their references. Thus, a reference could still be held to a struct device, e.g., by sysfs, leading to potential use-after-free issues if a proper release function is not set.",
    "evidence": "osv:CVE-2025-21856",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.80",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.17",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-21856",
      "aliases": [
        "CVE-2025-21856"
      ],
      "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": "8c81ba20349daf9f7e58bb05a0c12f4b71813a30"
                },
                {
                  "fixed": "940d15254d2216b585558bcf36312da50074e711"
                },
                {
                  "fixed": "0505ff2936f166405d81d0d454a81d9c14124344"
                },
                {
                  "fixed": "e26e8ac27351f457091459a0a355bacd06d5bb2b"
                },
                {
                  "fixed": "915e34d5ad35a6a9e56113f852ade4a730fb88f0"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21856.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.3.0"
                },
                {
                  "fixed": "6.6.80"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.17"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21856.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.450296245Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0505ff2936f166405d81d0d454a81d9c14124344",
        "https://git.kernel.org/stable/c/915e34d5ad35a6a9e56113f852ade4a730fb88f0",
        "https://git.kernel.org/stable/c/940d15254d2216b585558bcf36312da50074e711",
        "https://git.kernel.org/stable/c/e26e8ac27351f457091459a0a355bacd06d5bb2b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21856.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21856",
        "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/2025/21xxx/CVE-2025-21856.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21856",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504589,
  "published_at": "2025-03-12T09:42:09.929+00:00"
}