{"id":"CVE-2021-1956","aliases":["EUVD-2021-7420","GHSA-w32f-37w4-xj86"],"status":"published","title":"Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference...","description":"Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference with piconet in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice \u0026 Music","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":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00233,"percentile":0.14301,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-09-09T07:35:54Z","modified":"2026-06-17T03:33:01Z","products":[{"vendor":"qualcomm","product":"aqt1000_firmware"},{"vendor":"qualcomm","product":"ar8035_firmware"},{"vendor":"qualcomm","product":"csrb31024_firmware"},{"vendor":"qualcomm","product":"qca6175a_firmware"},{"vendor":"qualcomm","product":"qca6390_firmware"},{"vendor":"qualcomm","product":"qca6391_firmware"},{"vendor":"qualcomm","product":"qca6420_firmware"},{"vendor":"qualcomm","product":"qca6430_firmware"},{"vendor":"qualcomm","product":"qca6564a_firmware"},{"vendor":"qualcomm","product":"qca6564au_firmware"},{"vendor":"qualcomm","product":"qca6574_firmware"},{"vendor":"qualcomm","product":"qca6574a_firmware"},{"vendor":"qualcomm","product":"qca6574au_firmware"},{"vendor":"qualcomm","product":"qca6584au_firmware"},{"vendor":"qualcomm","product":"qca6595_firmware"},{"vendor":"qualcomm","product":"qca6595au_firmware"},{"vendor":"qualcomm","product":"qca6696_firmware"},{"vendor":"qualcomm","product":"qca8337_firmware"},{"vendor":"qualcomm","product":"qcn7605_firmware"},{"vendor":"qualcomm","product":"qcn7606_firmware"},{"vendor":"qualcomm","product":"qcx315_firmware"},{"vendor":"qualcomm","product":"sa415m_firmware"},{"vendor":"qualcomm","product":"sa515m_firmware"},{"vendor":"qualcomm","product":"sa6145p_firmware"},{"vendor":"qualcomm","product":"sa6150p_firmware"},{"vendor":"qualcomm","product":"sa6155_firmware"},{"vendor":"qualcomm","product":"sa6155p_firmware"},{"vendor":"qualcomm","product":"sa8145p_firmware"},{"vendor":"qualcomm","product":"sa8150p_firmware"},{"vendor":"qualcomm","product":"sa8155_firmware"},{"vendor":"qualcomm","product":"sa8155p_firmware"},{"vendor":"qualcomm","product":"sa8195p_firmware"},{"vendor":"qualcomm","product":"sc8180x\\+sdx55_firmware"},{"vendor":"qualcomm","product":"sd_8c_firmware"},{"vendor":"qualcomm","product":"sd_8cx_firmware"},{"vendor":"qualcomm","product":"sdx55_firmware"},{"vendor":"qualcomm","product":"wcd9340_firmware"},{"vendor":"qualcomm","product":"wcd9341_firmware"},{"vendor":"qualcomm","product":"wcd9360_firmware"},{"vendor":"qualcomm","product":"wcn3998_firmware"},{"vendor":"qualcomm","product":"wsa8810_firmware"},{"vendor":"qualcomm","product":"wsa8815_firmware"},{"vendor":"qualcomm, inc.","product":"snapdragon auto, snapdragon compute, snapdragon connectivity, snapdragon consumer electronics connectivity, snapdragon industrial iot, snapdragon mobile, snapdragon voice \u0026 music"}],"references":[{"url":"https://www.qualcomm.com/company/product-security/bulletins/september-2021-bulletin","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-1956"},{"url":"https://github.com/advisories/GHSA-w32f-37w4-xj86"}],"sources":{"cve":[{"id":"CVE-2021-1956","description":"Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference with piconet in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice \u0026 Music","status":"published","published":"2021-09-09T07:35:54Z","modified":"2024-08-03T16:25:06.355Z","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":"cna"}],"updated_at":"2026-11-02T14:33:08.409321Z"}],"euvd":[{"id":"EUVD-2021-7420","description":"Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference with piconet in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice \u0026 Music","status":"published","published":"2021-09-09T07:35:54Z","modified":"2024-08-03T16:25:06Z","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"}],"updated_at":"2026-11-03T03:25:14.091701Z"}],"ghsa":[{"id":"GHSA-w32f-37w4-xj86","title":"Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference...","description":"Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference with piconet in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice \u0026 Music","status":"published","published":"2022-05-24T19:14:05Z","modified":"2023-01-30T05:02:09Z","updated_at":"2026-11-02T14:46:34.725436Z"}],"nvd":[{"id":"CVE-2021-1956","description":"Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference with piconet in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice \u0026 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