{"id":"CVE-2021-34149","aliases":["EUVD-2021-20811","GHSA-3fq3-m842-mpf8"],"status":"published","title":"The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly...","description":"The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly handle the reception of continuous LMP_AU_Rand packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.","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":"2026-11-11","score":0.00508,"percentile":0.43887,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-09-07T06:16:16Z","modified":"2026-06-17T03:55:31Z","products":[{"vendor":"ti","product":"cc256xcqfn-em_firmware"}],"references":[{"url":"https://www.ti.com/tool/CC256XC-BT-SP#primary-sw","tags":["x_refsource_MISC","x_transferred","Product","Vendor Advisory"]},{"url":"https://www.ti.com/product/CC2564C","tags":["x_refsource_MISC","x_transferred","Product","Vendor Advisory"]},{"url":"https://dl.packetstormsecurity.net/papers/general/braktooth.pdf","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34149"},{"url":"https://github.com/advisories/GHSA-3fq3-m842-mpf8"}],"sources":{"cve":[{"id":"CVE-2021-34149","description":"The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly handle the reception of continuous LMP_AU_Rand packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.","status":"published","published":"2021-09-07T06:16:16Z","modified":"2024-08-04T00:05:52.374Z","updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2021-20811","description":"The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly handle the reception of continuous LMP_AU_Rand packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.","status":"published","published":"2021-09-07T06:16:16Z","modified":"2024-08-04T00:05:52Z","updated_at":"2026-11-03T03:24:32.880562Z"}],"ghsa":[{"id":"GHSA-3fq3-m842-mpf8","title":"The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly...","description":"The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly handle the reception of continuous LMP_AU_Rand packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.","status":"published","published":"2022-05-24T19:13:15Z","modified":"2023-01-30T05:01:56Z","updated_at":"2026-11-02T14:46:31.204916Z"}],"nvd":[{"id":"CVE-2021-34149","description":"The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly handle the reception of continuous LMP_AU_Rand packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.","status":"published","published":"2021-09-07T07:15:07.467Z","modified":"2026-06-17T03:55:31.083Z","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":3.3,"vector":"AV:A/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:06:58.05696Z"}]}}