{"id":"CVE-2026-42805","aliases":["EUVD-2026-75361","GHSA-7h94-3r4w-8qw8"],"status":"published","title":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C...","description":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C library) within the debug message parser function bhi385_parse_debug_message (located in bhi385_parse.c). \r\n\r\nThe function parses FIFO events and extracts an 8-bit message length directly from the attacker-controlled event payload (callback_info-\u003edata_ptr[0]) without enforcing bounds checks or clamping the value.\r\n\r\nWhen copying the payload into a fixed-size stack buffer of 17 bytes (uint8_t debug_msg[17]) via memcpy, providing a length byte greater than 16 causes the function to write past the allocated stack boundary. \r\n\r\nThis memory corruption can be triggered by a malicious or compromised sensor or bus participant, leading to a firmware crash, Denial of Service (DoS), or potentially the execution of arbitrary code via adjacent stack data corruption.","severity":{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00191,"percentile":0.08821,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-09-10T09:04:09Z","modified":"2026-09-10T16:17:12Z","products":[{"vendor":"bosch sensortec","product":"bhi385 sensorapi (c library)"}],"references":[{"url":"https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42805"},{"url":"https://github.com/advisories/GHSA-7h94-3r4w-8qw8"}],"sources":{"cve":[{"id":"CVE-2026-42805","description":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C library) within the debug message parser function bhi385_parse_debug_message (located in bhi385_parse.c). \r\n\r\nThe function parses FIFO events and extracts an 8-bit message length directly from the attacker-controlled event payload (callback_info-\u003edata_ptr[0]) without enforcing bounds checks or clamping the value.\r\n\r\nWhen copying the payload into a fixed-size stack buffer of 17 bytes (uint8_t debug_msg[17]) via memcpy, providing a length byte greater than 16 causes the function to write past the allocated stack boundary. \r\n\r\nThis memory corruption can be triggered by a malicious or compromised sensor or bus participant, leading to a firmware crash, Denial of Service (DoS), or potentially the execution of arbitrary code via adjacent stack data corruption.","status":"published","published":"2026-09-10T09:04:09.212Z","modified":"2026-09-10T15:01:26.029Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T13:40:23.731501Z"}],"euvd":[{"id":"EUVD-2026-75361","description":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C library) within the debug message parser function bhi385_parse_debug_message (located in bhi385_parse.c). \r\n\r\nThe function parses FIFO events and extracts an 8-bit message length directly from the attacker-controlled event payload (callback_info-\u003edata_ptr[0]) without enforcing bounds checks or clamping the value.\r\n\r\nWhen copying the payload into a fixed-size stack buffer of 17 bytes (uint8_t debug_msg[17]) via memcpy, providing a length byte greater than 16 causes the function to write past the allocated stack boundary. \r\n\r\nThis memory corruption can be triggered by a malicious or compromised sensor or bus participant, leading to a firmware crash, Denial of Service (DoS), or potentially the execution of arbitrary code via adjacent stack data corruption.","status":"published","published":"2026-09-10T09:04:09Z","modified":"2026-09-10T15:01:26Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T17:28:24.501469Z"}],"ghsa":[{"id":"GHSA-7h94-3r4w-8qw8","title":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C...","description":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C library) within the debug message parser function bhi385_parse_debug_message (located in bhi385_parse.c). \n\nThe function parses FIFO events and extracts an 8-bit message length directly from the attacker-controlled event payload (callback_info-\u003edata_ptr[0]) without enforcing bounds checks or clamping the value.\n\nWhen copying the payload into a fixed-size stack buffer of 17 bytes (uint8_t debug_msg[17]) via memcpy, providing a length byte greater than 16 causes the function to write past the allocated stack boundary. \n\nThis memory corruption can be triggered by a malicious or compromised sensor or bus participant, leading to a firmware crash, Denial of Service (DoS), or potentially the execution of arbitrary code via adjacent stack data corruption.","status":"published","published":"2026-09-10T09:31:33Z","modified":"2026-09-10T09:31:34Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:11:41.43854Z"}],"nvd":[{"id":"CVE-2026-42805","description":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI385 SensorAPI (C library) within the debug message parser function bhi385_parse_debug_message (located in bhi385_parse.c). \r\n\r\nThe function parses FIFO events and extracts an 8-bit message length directly from the attacker-controlled event payload (callback_info-\u003edata_ptr[0]) without enforcing bounds checks or clamping the value.\r\n\r\nWhen copying the payload into a fixed-size stack buffer of 17 bytes (uint8_t debug_msg[17]) via memcpy, providing a length byte greater than 16 causes the function to write past the allocated stack boundary. \r\n\r\nThis memory corruption can be triggered by a malicious or compromised sensor or bus participant, leading to a firmware crash, Denial of Service (DoS), or potentially the execution of arbitrary code via adjacent stack data corruption.","status":"published","published":"2026-09-10T09:17:02.013Z","modified":"2026-09-10T16:17:12.17Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:12:45.93749Z"}]}}