{"id":"CVE-2021-3564","details":"A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the system. This flaw affects all the Linux kernel versions starting from 3.13.","modified":"2026-04-16T00:02:23.866402802Z","published":"2021-06-08T12:15:11.753Z","related":["ALSA-2021:4356","CGA-xp87-5j7f-5x3f","SUSE-SU-2022:0362-1","SUSE-SU-2022:0364-1","SUSE-SU-2022:0366-1","SUSE-SU-2022:0367-1","SUSE-SU-2022:0371-1","SUSE-SU-2022:0372-1","SUSE-SU-2022:0477-1","SUSE-SU-2022:0555-1","openSUSE-SU-2022:0366-1"],"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1964139"},{"type":"EVIDENCE","url":"https://www.openwall.com/lists/oss-security/2021/05/25/1"},{"type":"EVIDENCE","url":"http://www.openwall.com/lists/oss-security/2021/05/25/1"},{"type":"EVIDENCE","url":"http://www.openwall.com/lists/oss-security/2021/06/01/2"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"3.13"}]},{"events":[{"introduced":"0"},{"last_affected":"34"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-3564.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}