{"id":"UBUNTU-CVE-2021-3658","details":"bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and restores it when powered up. If a device is powered down while discoverable, it will be discoverable when powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby attackers.","modified":"2026-04-27T09:14:13.261874Z","published":"2021-07-28T00:00:00Z","related":["USN-5155-1"],"upstream":["CVE-2021-3658"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3658"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5155-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-3658"}],"affected":[{"package":{"name":"bluez","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/bluez@5.53-0ubuntu3.4?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.53-0ubuntu3.4"}]}],"versions":["5.50-0ubuntu4","5.51-0ubuntu1","5.51-0ubuntu2","5.52-0ubuntu1","5.52-0ubuntu2","5.53-0ubuntu1","5.53-0ubuntu2","5.53-0ubuntu3","5.53-0ubuntu3.1","5.53-0ubuntu3.2","5.53-0ubuntu3.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"bluetooth","binary_version":"5.53-0ubuntu3.4"},{"binary_name":"bluez","binary_version":"5.53-0ubuntu3.4"},{"binary_name":"bluez-cups","binary_version":"5.53-0ubuntu3.4"},{"binary_name":"bluez-hcidump","binary_version":"5.53-0ubuntu3.4"},{"binary_name":"bluez-obexd","binary_version":"5.53-0ubuntu3.4"},{"binary_name":"bluez-tests","binary_version":"5.53-0ubuntu3.4"},{"binary_name":"libbluetooth3","binary_version":"5.53-0ubuntu3.4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3658.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}]}