{"id":"CVE-2026-42805","title":"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)","summary":"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 a…","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-121"],"vendor":"Bosch Sensortec","product":"BHI385 SensorAPI (C Library)","affected":["bhi385_sensorapi_c_library >= 1.1.0 <= 2.1.0"],"published":"2026-09-10","updated":"2026-09-10","sourceUpdated":"2026-09-10T16:17:12.170","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-42805","references":[{"url":"https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html","label":"psirt@bosch.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-10T15:01:13.115369Z"},"ingestedAt":"2026-09-10T09:45:12.028Z","epss":0.00142,"epssPercentile":0.0386,"slug":"CVE-2026-42805","body":"## Overview\n\nA 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->data_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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}