There are historical bugs in Bitcoin Core. Bitcoin Core is the distributed software that verifies the protocol rules. Analysing the bugs that have been fixed can help us to understand how the network has grown stronger over the years. 1) 184 billion overflow (2010): An error in the checks generated a block containing 184 billion bitcoins, which exceeds the 21 million limit. The community intervened within a few hours, invalidating the block and providing an immediate update. Monetary integrity was restored. 2) Programme blockage caused by an instruction (2010): Some scripts could cause the node to crash. This instruction was disabled in version 0.3.5. Reduction of the attack surface. 3) Risk of divergent chains (2012): A flaw in the block structure could create incompatible versions of the blockchain. A quick fix was implemented and the network was re-composed. 4) Node privacy (2013): A vulnerability allowed IP addresses to be linked to Bitcoin addresses. Patches were distributed between January and February 2013. Privacy requires ongoing maintenance. 5) Risk of double spending and inflation (2018): A fundamental input check was accidentally removed by a change. There were no attacks on the main network and an immediate patch was applied. 6) Counter exhaustion (2025): Suboptimal address management could block the node in the long run. Switch to 64-bit counters in recent versions. All bugs have been fixed without causing any permanent issues. Thanks to open source software, independent checks and timely updates, the network has shown resilience. Updating the node is a shared responsibility. #bugs #bitcoin #core #software #opensource #issues #network