{"api_version":"1","generated_at":"2026-04-23T07:56:09+00:00","cve":"CVE-2021-3573","urls":{"html":"https://cve.report/CVE-2021-3573","api":"https://cve.report/api/cve/CVE-2021-3573.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-3573","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3573"},"summary":{"title":"CVE-2021-3573","description":"A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. 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