{"id":"CVE-2021-31787","aliases":["EUVD-2021-18668","GHSA-r5g9-33j7-96vc"],"status":"published","title":"The Bluetooth Classic implementation on Actions ATS2815 chipsets does not properly handle the...","description":"The Bluetooth Classic implementation on Actions ATS2815 chipsets does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and shutdown of a device by flooding the target device with LMP_features_res packets.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.0051,"percentile":0.44055,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2021-11-30T19:04:24Z","modified":"2026-06-17T03:52:14Z","products":[{"vendor":"actions-semi","product":"ats2815_firmware"},{"vendor":"actions-semi","product":"ats2819_firmware"},{"vendor":"actions-semi","product":"ats2819p_firmware"},{"vendor":"actions-semi","product":"ats2819s_firmware"},{"vendor":"actions-semi","product":"ats2819t_firmware"}],"references":[{"url":"https://www.actions-semi.com/index.php?id=3581\u0026siteId=4","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://launchstudio.bluetooth.com/ListingDetails/76427","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://dl.packetstormsecurity.net/papers/general/braktooth.pdf","tags":["x_refsource_MISC","x_transferred","Broken Link"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31787"},{"url":"https://github.com/advisories/GHSA-r5g9-33j7-96vc"}],"sources":{"cve":[{"id":"CVE-2021-31787","description":"The Bluetooth Classic implementation on Actions ATS2815 chipsets does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and shutdown of a device by flooding the target device with LMP_features_res packets.","status":"published","published":"2021-11-30T19:04:24Z","modified":"2024-08-03T23:10:30.124Z","updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18668","description":"The Bluetooth Classic implementation on Actions ATS2815 chipsets does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and shutdown of a device by flooding the target device with LMP_features_res packets.","status":"published","published":"2021-11-30T19:04:24Z","modified":"2024-08-03T23:10:30Z","updated_at":"2026-11-03T03:24:38.423371Z"}],"ghsa":[{"id":"GHSA-r5g9-33j7-96vc","title":"The Bluetooth Classic implementation on Actions ATS2815 chipsets does not properly handle the...","description":"The Bluetooth Classic implementation on Actions ATS2815 chipsets does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and shutdown of a device by flooding the target device with LMP_features_res packets.","status":"published","published":"2021-12-01T00:00:38Z","modified":"2023-02-01T05:06:39Z","cwes":["CWE-770"],"updated_at":"2026-11-02T14:50:23.506103Z"}],"nvd":[{"id":"CVE-2021-31787","description":"The Bluetooth Classic implementation on Actions ATS2815 chipsets does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and shutdown of a device by flooding the target device with LMP_features_res packets.","status":"published","published":"2021-11-30T20:15:07.477Z","modified":"2026-06-17T03:52:14.27Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":6.1,"vector":"AV:A/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}