Semtech LR11xx Memory Write Access Control Bypass_CVE-2025-14857

5.4 / 10

MEDIUM

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

Description

An improper access control vulnerability exists in Semtech LoRa LR11xxx transceivers running early versions of firmware where the memory write command accessible via the physical SPI interface fails to enforce write protection on the program call stack. An attacker with physical access to the SPI interface can overwrite stack memory to hijack program control flow and achieve limited arbitrary code execution. However, the impact is limited to the active attack session: the device's secure boot mechanism prevents persistent firmware modification, the crypto engine isolates cryptographic keys from direct firmware access, and all modifications are lost upon device reboot or loss of physical access.

Basic Information

ID CVE-2025-14857

Source SWI

Published Apr 7, 2026 at 19:56

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-123

References

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

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    "published": "2026-04-07T19:56:59.042Z",
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