Coldcard hardware wallet firmware

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Bitcoin Core changes security rules as AI makes finding code bugs dangerously easy
article2026-10-23It is written here as Coldcard hardware-wallet firmware (flaw dormant since 2021, exploited on July 30; fix since shipped).
flaw dormant since 2021, exploited on July 30; fix since shipped
Liquid Network — $320M L-BTC Mint via Range-Proof Cache-Key Collision
writeup
March 2021 firmware build had a configuration error causing fallback to a weak software random-number generator instead of the hardware entropy source, per TRM Labs.

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