{"id":"CVE-2019-17211","aliases":["EUVD-2019-7631","GHSA-7vph-mg46-qvjr"],"status":"published","title":"An integer overflow was discovered in the CoAP library in Arm Mbed OS 5.14.0. The function...","description":"An integer overflow was discovered in the CoAP library in Arm Mbed OS 5.14.0. The function sn_coap_builder_calc_needed_packet_data_size_2() is used to calculate the required memory for the CoAP message from the sn_coap_hdr_s data structure. Both returned_byte_count and src_coap_msg_ptr-\u003epayload_len are of type uint16_t. When added together, the result returned_byte_count can wrap around the maximum uint16_t value. As a result, insufficient buffer space is allocated for the corresponding CoAP message.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02574,"percentile":0.85293,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2019-11-05T15:06:40Z","modified":"2026-06-17T02:23:28Z","products":[{"vendor":"mbed","product":"mbed"}],"references":[{"url":"https://github.com/ARMmbed/mbed-os/blob/d0686fd30b4d3d02efdc7e4d0fbf0dfe173543b6/features/frameworks/mbed-coap/source/sn_coap_builder.c#L355","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/ARMmbed/mbed-os/blob/d0686fd30b4d3d02efdc7e4d0fbf0dfe173543b6/features/frameworks/mbed-coap/source/sn_coap_builder.c#L1090","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/ARMmbed/mbed-os/blob/d0686fd30b4d3d02efdc7e4d0fbf0dfe173543b6/features/frameworks/mbed-coap/source/sn_coap_builder.c#L710","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/ARMmbed/mbed-os/blob/d0686fd30b4d3d02efdc7e4d0fbf0dfe173543b6/features/frameworks/mbed-coap/source/sn_coap_builder.c#L524","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/ARMmbed/mbed-os/blob/d0686fd30b4d3d02efdc7e4d0fbf0dfe173543b6/features/frameworks/mbed-coap/source/sn_coap_builder.c#L527","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/ARMmbed/mbed-os/blob/d0686fd30b4d3d02efdc7e4d0fbf0dfe173543b6/features/frameworks/mbed-coap/source/sn_coap_builder.c#L718","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/ARMmbed/mbed-os/blob/d0686fd30b4d3d02efdc7e4d0fbf0dfe173543b6/features/frameworks/mbed-coap/source/sn_coap_builder.c#L746","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/ARMmbed/mbed-os/issues/11804","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-17211"},{"url":"https://github.com/advisories/GHSA-7vph-mg46-qvjr"}],"sources":{"cve":[{"id":"CVE-2019-17211","description":"An integer overflow was discovered in the CoAP library in Arm Mbed OS 5.14.0. The function sn_coap_builder_calc_needed_packet_data_size_2() is used to calculate the required memory for the CoAP message from the sn_coap_hdr_s data structure. Both returned_byte_count and src_coap_msg_ptr-\u003epayload_len are of type uint16_t. When added together, the result returned_byte_count can wrap around the maximum uint16_t value. As a result, insufficient buffer space is allocated for the corresponding CoAP message.","status":"published","published":"2019-11-05T15:06:40Z","modified":"2024-08-05T01:33:17.231Z","updated_at":"2026-11-02T14:20:24.678649Z"}],"euvd":[{"id":"EUVD-2019-7631","description":"An integer overflow was discovered in the CoAP library in Arm Mbed OS 5.14.0. The function sn_coap_builder_calc_needed_packet_data_size_2() is used to calculate the required memory for the CoAP message from the sn_coap_hdr_s data structure. Both returned_byte_count and src_coap_msg_ptr-\u003epayload_len are of type uint16_t. When added together, the result returned_byte_count can wrap around the maximum uint16_t value. As a result, insufficient buffer space is allocated for the corresponding CoAP message.","status":"published","published":"2019-11-05T15:06:40Z","modified":"2024-08-05T01:33:17Z","updated_at":"2026-11-03T02:40:30.885546Z"}],"ghsa":[{"id":"GHSA-7vph-mg46-qvjr","title":"An integer overflow was discovered in the CoAP library in Arm Mbed OS 5.14.0. The function...","description":"An integer overflow was discovered in the CoAP library in Arm Mbed OS 5.14.0. The function sn_coap_builder_calc_needed_packet_data_size_2() is used to calculate the required memory for the CoAP message from the sn_coap_hdr_s data structure. Both returned_byte_count and src_coap_msg_ptr-\u003epayload_len are of type uint16_t. When added together, the result returned_byte_count can wrap around the maximum uint16_t value. As a result, insufficient buffer space is allocated for the corresponding CoAP message.","status":"published","published":"2022-05-24T22:01:03Z","modified":"2024-04-04T03:07:10Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:56:13.784244Z"}],"nvd":[{"id":"CVE-2019-17211","description":"An integer overflow was discovered in the CoAP library in Arm Mbed OS 5.14.0. The function sn_coap_builder_calc_needed_packet_data_size_2() is used to calculate the required memory for the CoAP message from the sn_coap_hdr_s data structure. Both returned_byte_count and src_coap_msg_ptr-\u003epayload_len are of type uint16_t. When added together, the result returned_byte_count can wrap around the maximum uint16_t value. As a result, insufficient buffer space is allocated for the corresponding CoAP message.","status":"published","published":"2019-11-05T16:15:10.57Z","modified":"2026-06-17T02:23:28.677Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:05:35.052973Z"}]}}