Bluetooth: vhci: Prevent use-after-free by removing debugfs files early

{
  "id": "81c3d111b0e64aa21fa70539d13b69e9d6e12dd2afdea1dffea925576be5a163",
  "url": "https://osv.dev/vulnerability/CVE-2025-39861",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bluetooth: vhci: Prevent use-after-free by removing debugfs files early",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: vhci: Prevent use-after-free by removing debugfs files early Move the creation of debugfs files into a dedicated function, and ensure they are explicitly removed during vhci_release(), before associated data structures are freed. Previously, debugfs files such as \"force_suspend\", \"force_wakeup\", and others were created under hdev->debugfs but not removed in vhci_release(). Since vhci_release() frees the backing vhci_data structure, any access to these files after release would result in use-after-free errors. Although hdev->debugfs is later freed in hci_release_dev(), user can access files after vhci_data is freed but before hdev->debugfs is released.",
    "evidence": "osv:CVE-2025-39861",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.105",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.46",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.16.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-39861",
      "aliases": [
        "CVE-2025-39861"
      ],
      "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": "ab4e4380d4e158486e595013a2635190e07e28ce"
                },
                {
                  "fixed": "bd75eba88e88d7b896b0c737b02a74a12afc235f"
                },
                {
                  "fixed": "1503756fffe76d5aea2371a4b8dee20c3577bcfd"
                },
                {
                  "fixed": "7cc08f2f127b9a66f46ea918e34353811a7cb378"
                },
                {
                  "fixed": "28010791193a4503f054e8d69a950ef815deb539"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39861.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.4.0"
                },
                {
                  "fixed": "6.6.105"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.46"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.16.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39861.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.558044997Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1503756fffe76d5aea2371a4b8dee20c3577bcfd",
        "https://git.kernel.org/stable/c/28010791193a4503f054e8d69a950ef815deb539",
        "https://git.kernel.org/stable/c/7cc08f2f127b9a66f46ea918e34353811a7cb378",
        "https://git.kernel.org/stable/c/bd75eba88e88d7b896b0c737b02a74a12afc235f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39861.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-39861",
        "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/2025/39xxx/CVE-2025-39861.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-39861",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496437,
  "published_at": "2025-09-19T15:26:31.519+00:00"
}