CVE-2025-14858
Description
The Semtech LR11xx LoRa transceivers running early versions of firmware contains an information disclosure vulnerability in its firmware validation functionality. When a host issues a firmware validity check command via the SPI interface, the device decrypts the provided encrypted firmware package block-by-block to validate its integrity. However, the last decrypted firmware block remains uncleared in memory after the validation process completes. An attacker with access to the SPI interface can subsequently issue memory read commands to retrieve the decrypted firmware contents from this residual memory, effectively bypassing the firmware encryption protection mechanism. The attack requires physical access to the device's SPI interface.
How to fix
- Semtech LR1110TRX FW 0x0402 or later
- Semtech LR1120TRX FW 0x0202 or later
- Semtech LR1121TRX FW 0x0104 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Semtech LR1110 | v < TRX FW 0x0402 | TRX FW 0x0402 |
| Semtech LR1120 | v < TRX FW 0x0202 | TRX FW 0x0202 |
| Semtech LR1121 | v < TRX FW 0x0104 | TRX FW 0x0104 |
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