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Disclosures

SiliconLabs · Gecko SDK

Integer Underflow Leading to Buffer Overread in Secure NCP Host

2.4low
SecMateSECMATE-2025-0026
VendorSiliconLabs
ProductGecko SDK
VectorCVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Timeline
Reported
Nov 24, 2025
Acknowledged
Nov 24, 2025
Published
Feb 19, 2026
Summary

An integer underflow vulnerability in Silicon Labs Secure NCP host implementation allows a buffer overread via a specially crafted packet.

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