# Bitcoin Core undo file overflow vulnerability

A bug allows miners to corrupt undo data, causing node shutdowns under specific conditions. Affected nodes on 32-bit or Windows systems fail during restarts. A fix was released in Bitcoin Core 29.5 and later versions.

https://bitcoincore.org/en/2026/10/28/disclose-undo-overflow/

#bitcoin #core #security

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Canonical URL: https://qwibbit.com/q31255

Created: 2026-10-28T18:54:57.067677+00:00

Last edited: 2026-10-28T18:54:57.067677+00:00

Board: 3

Origin: Syndicated

Original source: https://bitcoincore.org/en/2026/10/28/disclose-undo-overflow/