EUVD-2026-75362
GHSA-wf7g-q2xv-vf8v
Severity by source
AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Physical bus access required (AV:P); no auth needed once on bus; limited C/I/A from stack byte leak and measurement corruption.
Primary rating from Vendor (bosch).
CVSS VectorVendor: bosch
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Out-of-bounds stack read in Bosch BME690 SensorAPI v1.0.3 enables a physically adjacent attacker - or a compromised peripheral mimicking the sensor - to leak up to 6 bytes of adjacent stack memory and corrupt gas sensor measurement outputs. The flaw is in gas_index parsing within read_all_field_data (bme69x.c): a 4-bit mask permits values 0-15 while the heater configuration stack buffer only covers indices 0-9, and the leaked OOB byte is written directly into the public gas_wait field where it may be telemetered or logged. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires physical or hardware-level access to the I2C or SPI bus connecting the host MCU to the BME690 sensor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.3 score with AV:P accurately reflects the significant physical access barrier: exploitation requires either direct bus-level access to the I2C/SPI lines or the insertion of a rogue peripheral that impersonates the BME690 hardware. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Per Bosch PSIRT advisory BOSCH-SA-223618 (https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html), users should upgrade the BME690 SensorAPI to a version beyond v1.0.3; the precise fixed release number is not specified in the available input data and should be confirmed directly from the Bosch PSIRT advisory page. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-125 – Out-of-bounds Read
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External POC / Exploit Code
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