Vulnerability · Published Sep 10, 2026 · Assigned by bosch
CVE-2026-42805
High 8.4
In plain English
A high-severity stack buffer overflow in BHI385 SensorAPI (C Library) from Bosch Sensortec. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Official 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). The 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. When 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. This 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Bosch Sensortec | BHI385 SensorAPI (C Library) | 1.1.0 – through 2.1.0 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html vendor-advisory