{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "97730bbb242cde22b7140acd202ffd88823886c9"
            },
            {
              "fixed": "517676ec7dfca064e08f94007a4abd21969de0a0"
            },
            {
              "fixed": "46d403da376a8b7c1187193294953816e1a8d7fe"
            },
            {
              "fixed": "2619b47a0c8114eef980a56ade7e3ef4b58eb384"
            },
            {
              "fixed": "92f41769e5fd16bcd9ba97500d0517332e0a5b45"
            },
            {
              "fixed": "15432f19562fdb9199cce6d9fc24db12c71ed574"
            },
            {
              "fixed": "896df22ee57648b0c505bd76ddbc6b2341834696"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.19.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64376.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware_loader: fix device reference leak in firmware_upload_register()\n\nfirmware_upload_register()\n  -\u003e fw_create_instance()\n     -\u003e device_initialize()\n\nAfter fw_create_instance() succeeds, the lifetime of the embedded struct\ndevice is expected to be managed through the device core reference\ncounting, since fw_create_instance() has already called\ndevice_initialize().\n\nIn firmware_upload_register(), if alloc_lookup_fw_priv() fails after\nfw_create_instance() succeeds, the code reaches free_fw_sysfs and frees\nfw_sysfs directly instead of releasing the device reference with\nput_device(). This may leave the reference count of the embedded struct\ndevice unbalanced, resulting in a refcount leak.\n\nThe issue was identified by a static analysis tool I developed and\nconfirmed by manual review. Fix this by using put_device(fw_dev) in the\nfailure path and letting fw_dev_release() handle the final cleanup,\ninstead of freeing the instance directly from the error path.",
  "id": "CVE-2026-64376",
  "modified": "2026-07-27T03:56:15.723470918Z",
  "published": "2026-07-25T08:50:27.577Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15432f19562fdb9199cce6d9fc24db12c71ed574"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2619b47a0c8114eef980a56ade7e3ef4b58eb384"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46d403da376a8b7c1187193294953816e1a8d7fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/517676ec7dfca064e08f94007a4abd21969de0a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/896df22ee57648b0c505bd76ddbc6b2341834696"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92f41769e5fd16bcd9ba97500d0517332e0a5b45"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64376.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64376"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "firmware_loader: fix device reference leak in firmware_upload_register()"
}