| ID |
CVE-2026-42806
|
| Sažetak |
An out-of-bounds read vulnerability was discovered in the Bosch BME690 SensorAPI (C-driver) in version v1.0.3 and prior, specifically within the field data parsing logic in read_all_field_data (bme69x.c).
The driver prefetches heater configuration registers into a contiguous 30-byte stack buffer (set_val) mapping IDAC, RES_HEAT, and GAS_WAIT tables.
When parsing sensor field data, the gas_index is extracted using a 4-bit mask (0..15) but lacks boundary verification against the valid range (0..9).
An attacker or a compromised peripheral mimicking a sensor on the I2C/SPI bus could return a payload with a gas index value of 10 or higher.
This causes the driver to perform an out-of-bounds array access (set_val[20 + gas_index]), reading up to 6 bytes past the stack buffer.
The leaked out-of-bounds byte is then written into the public gas_wait field, which may lead to measurement corruption or leak adjacent stack memory when telemetered or logged. |
| Reference |
|
| CVSS |
| Base: | 4.3 |
| Impact: | 3.4 |
| Exploitability: | 0.9 |
|
| Pristup |
| Vektor | Složenost | Autentikacija |
| PHYSICAL |
LOW |
NONE |
|
| Impact |
| Povjerljivost | Cjelovitost | Dostupnost |
| LOW |
LOW |
LOW |
|
| CVSS vektor |
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| Zadnje važnije ažuriranje |
10-09-2026 - 16:17 |
| Objavljeno |
10-09-2026 - 09:17 |
