Semtech LR11xx Encrypted Firmware Disclosure_CVE-2025-14858

5.1 / 10

MEDIUM

CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/AU:N/R:A/V:C/RE:M

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.

Basic Information

ID CVE-2025-14858

Source SWI

Published Apr 7, 2026 at 19:57

Modified Apr 7, 2026 at 20:42

Affected Product

Vendor Semtech

Product LR1110

Affected Versions Semtech LR1110 0
Semtech LR1120 0
Semtech LR1121 0

CWE Classification

CWE-226

References

www.semtech.com /company/security/security-bulletins/sem-psa-2026-001

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    "published": "2026-04-07T19:57:43.422Z",
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