{"id":"CVE-2021-25477","aliases":["A-220262213","ASB-A-220262213","EUVD-2021-12373","GHSA-r436-49p3-g4hr","M-MOLY00684727"],"status":"published","title":"An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows...","description":"An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.","severity":{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00497,"percentile":0.42953,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-415"],"published":"2021-10-06T17:09:03Z","modified":"2026-11-05T16:32:28Z","fixes":[{"ecosystem":"Android","package":":unknown:","fixed_in":["SoCVersion:2022-04-05"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Android","package":":unknown:","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"SoCVersion:0"},{"fixed":"SoCVersion:2022-04-05"}]}],"versions":["SoCVersion"]}],"products":[{"vendor":"google","product":"android"},{"vendor":"samsung mobile","product":"samsung mobile devices"}],"references":[{"url":"https://security.samsungmobile.com/securityUpdate.smsb?year=2021\u0026month=10","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25477"},{"url":"https://github.com/advisories/GHSA-r436-49p3-g4hr"},{"url":"https://source.android.com/security/bulletin/2022-04-01","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-25477","description":"An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.","status":"published","published":"2021-10-06T17:09:03Z","modified":"2024-08-03T20:03:05.658Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:32:59.802172Z"}],"euvd":[{"id":"EUVD-2021-12373","description":"An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.","status":"published","published":"2021-10-06T17:09:03Z","modified":"2024-08-03T20:03:05Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T03:24:52.867371Z"}],"ghsa":[{"id":"GHSA-r436-49p3-g4hr","title":"An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows...","description":"An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.","status":"published","published":"2022-05-24T19:16:44Z","modified":"2023-01-30T05:02:36Z","cwes":["CWE-415"],"updated_at":"2026-11-02T14:46:40.355653Z"}],"nvd":[{"id":"CVE-2021-25477","description":"An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.","status":"published","published":"2021-10-06T18:15:09.063Z","modified":"2026-06-17T03:42:09.413Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:06:59.314106Z"}],"osv":[{"id":"ASB-A-220262213","description":"In Modem LTE RRC, there is a possible memory corruption due to a double free. This could lead to remote denial of service when decoding an incorrect ASN.1 data with no additional execution privileges needed. User interaction is not needed for exploitation.","status":"published","published":"2022-04-01T00:00:00Z","modified":"2026-11-10T17:02:23.040266809Z","updated_at":"2026-11-10T17:35:05.376141Z"}]}}