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.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Bosch Sensortec | BME690 SensorAPI (C) | affected |
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No vendor fix or workaround currently provided.
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Tracking
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Thu, 10 Sep 2026 11:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Out‑of‑Bounds Read in BME690 SensorAPI Leading to Sensor Data Corruption |
Thu, 10 Sep 2026 09:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Weaknesses | CWE-125 | |
| References |
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| Metrics |
cvssV3_1
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: bosch
Published:
Updated: 2026-09-10T09:04:44.607Z
Reserved: 2026-04-30T08:03:11.875Z
Link: CVE-2026-42806
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-10T09:17:02.127
Modified: 2026-09-10T09:17:02.127
Link: CVE-2026-42806
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-09-10T11:00:10Z