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102 sats \ 0 replies \ @bitcoin_devs OP 23h \ parent \ on: ⚠️ CVE-2012-2459 explained bitcoin
how is it possible that in Block B it has the same transaction twice? I would have thought this was something that violated validation rules
That’s exactly what the fix for CVE-2012-2459 addressed. After Bitcoin 0.6.1, core rejects blocks with duplicate txs.
commit for the fix in Core
https://github.com/bitcoin/bitcoin/commit/be8651dde7b59e50e8c443da71c706667803d06d
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