{"cve":"CVE-2026-64376","nvd":{"published":"2026-07-25T10:17:20.717","modified":"2026-09-08T14:21:55.037","status":"Analyzed","description":"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  -> fw_create_instance()\n     -> 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/15432f19562fdb9199cce6d9fc24db12c71ed574","https://git.kernel.org/stable/c/2619b47a0c8114eef980a56ade7e3ef4b58eb384","https://git.kernel.org/stable/c/46d403da376a8b7c1187193294953816e1a8d7fe","https://git.kernel.org/stable/c/517676ec7dfca064e08f94007a4abd21969de0a0","https://git.kernel.org/stable/c/896df22ee57648b0c505bd76ddbc6b2341834696"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:46:40.600842820+00:00"},"epss":{"cve":"CVE-2026-64376","score":0.00123,"percentile":0.02015,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}