CVE-2026-42805 Memory corruption in BHI385 SensorAPI (C Library)
A stack-based buffer overflow in the Bosch BHI385 SensorAPI allows attackers to cause denial of service or execute arbitrary code via malicious sensor data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42805?
CVE-2026-42805 is a high-severity memory corruption vulnerability in Bosch Sensortec BHI385 SensorAPI (C Library), published on 10 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Weakness: CWE-121
Which versions are affected by CVE-2026-42805?
How do I fix CVE-2026-42805?
No fix has been published for CVE-2026-42805 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-42805 being exploited?
There is no known exploitation of CVE-2026-42805 in the wild and no public exploit code.
Sources
Also known as GHSA-7h94-3r4w-8qw8.