CVE Catalog

CVE-2026-42805

HighCVSS 8.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.14%

4th percentile - higher than 4% of all known CVEs

Summary

A stack-based buffer overflow in the Bosch Sensortec BHI385 SensorAPI (C library) within the debug message parser function bhi385_parse_debug_message (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 bounds checks; copying into a fixed-size 17-byte stack buffer via memcpy with a length byte greater than 16 writes past the stack boundary, leading to firmware crash, DoS, or potentially arbitrary code execution.

Risk Assessment

A malicious or compromised sensor or bus participant can corrupt stack memory, causing a crash or potentially arbitrary code execution, leading to device compromise.

Recommendation

Update BHI385 SensorAPI to a version that fixes the vulnerability, or restrict the use of untrusted sensors and bus devices.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS