{"api_version":"1","generated_at":"2026-04-22T23:31:23+00:00","cve":"CVE-2021-3640","urls":{"html":"https://cve.report/CVE-2021-3640","api":"https://cve.report/api/cve/CVE-2021-3640.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-3640","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3640"},"summary":{"title":"CVE-2021-3640","description":"A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. 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RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.","Type":"Description","Title":null}]}}}