Blog
2024
Disclosure of remote crash due to addr message spam
Nodes could be spammed with addr messsages, which could be used to crash them. A fix was released on September 14th, 2021 in Bitcoin Core v22.0.
Disclosure of the impact of an infinite loop bug in the miniupnp dependency
Nodes could be crashed by a malicious UPnP device on the local network. A fix was released on September 14th, 2021 in Bitcoin Core v22.0.
Bitcoin Core 26.2 released
Bitcoin Core 26.2 is now available.
Disclosure of crash using malicious BIP72 URI
The BIP70 implementation in Bitcoin-Qt could silently crash when opening a BIP72 URI. A fix was released on June 3rd, 2020 in Bitcoin Core 0.20.0.
Disclosure of DoS using huge GETDATA messages
A malformed GETDATA message could trigger 100% CPU usage on the receiving node. A fix was released on June 3rd, 2020 in Bitcoin Core 0.20.0.
Disclosure of memory DoS using low-difficulty headers
Nodes could be spammed with low-difficulty headers, which could be used to crash it. A fix was released on September 14th, 2017 in Bitcoin Core 0.15.0.
Disclosure of memory DoS using huge INV messages
Nodes would allocate up to 50 MB of memory per attacker sending a malicious INV message. A fix was released on June 3rd, 2020 in Bitcoin Core 0.20.0.
Disclosure of significant DoS due to orphan handling
A node could be stalled for hours when receiving a specially crafted unconfirmed transaction. A fix was released on May 18th, 2019 in Bitcoin Core 0.18.0.
Disclosure of netsplit due to timestamp adjustment
A node could be split from the network when attacked by its first 200 peers. A fix was released on January 15th, 2021 in Bitcoin Core version 0.21.0.
Disclosure of CVE-2020-14198
Nodes could be subject to CPU and memory DoS when attacked by lots of distinct IPs. A fix was released on August 1st, 2020 in Bitcoin Core 0.20.1.
Disclosure of censorship due to transaction re-request handling
Nodes could be prevented from seeing specific unconfirmed transactions by a malicious peer. A fix was released on January 14th, 2021 in Bitcoin Core 0.21.0.
Disclosure of CVE-2015-3641
Attackers sending large incomplete messages would cause high memory usage. A fix was released on April 27th, 2015 in Bitcoin Core 0.10.1.
Disclosure of remote code execution due to bug in miniupnpc
A bug in the miniupnpc library could have led to a remote code execution in Bitcoin Core. A fix was released on October 15th, 2015 in Bitcoin Core 0.11.1.
Bitcoin Core 27.1 released
Bitcoin Core 27.1 is now available.
Bitcoin Core 27.0 released
Bitcoin Core 27.0 is now available.
Bitcoin Core 25.2 released
Bitcoin Core 25.2 is now available.
Bitcoin Core 26.1 released
Bitcoin Core 26.1 is now available.
2023
Bitcoin Core 26.0 released
Bitcoin Core 26.0 is now available.
Bitcoin Core 24.2 released
Bitcoin Core 24.2 is now available.
Bitcoin Core 25.1 released
Bitcoin Core 25.1 is now available.
Bitcoin Core 25.0 released
Bitcoin Core 25.0 is now available.
Bitcoin Core 23.2 released
Bitcoin Core 23.2 is now available.
Bitcoin Core 24.1 released
Bitcoin Core 24.1 is now available.
2022
Bitcoin Core 23.1 released
Bitcoin Core 23.1 is now available.
Bitcoin Core 22.1 released
Bitcoin Core 22.1 is now available.
Bitcoin Core 24.0.1 released
Bitcoin Core 24.0.1 is now available.
Bitcoin Core 23.0 released
Bitcoin Core 23.0 is now available.
2021
Bitcoin Core 0.20.2 released
Bitcoin Core 0.20.2 is now available.
Bitcoin Core 0.21.2 released
Bitcoin Core 0.21.2 is now available.
Bitcoin Core 22.0 released
Bitcoin Core 22.0 is now available.
Bitcoin Core 0.21.1 Released With Taproot Activation Code
Bitcoin Core 0.21.1 is now available with support for activating and enforcing taproot.
Bitcoin Core 0.21.0 Released
Bitcoin Core 0.21.0 is now available with multiple improvements.
2020
Bitcoin Core 0.20.1 Released
A new maintenance release of Bitcoin Core is now available for download.
Bitcoin Core 0.20.0 Released
Bitcoin Core 0.20.0 is now available with multiple improvements.
bitcoincore.org hidden service
After frequent requests, this site is now reachable as a Tor hidden service
Bitcoin Core 0.19.1 Released
The Bitcoin Core 0.19.1 maintenance release is now available with bug fixes and minor improvements.
2019
Bitcoin Core 0.19.0 Released
Bitcoin Core 0.19.0 has been released with new features, performance improvements, and several bug fixes.
Disclosure of CVE-2017-18350
Nodes were potentially vulnerable to a buffer overflow by malicious SOCKS servers. A fix was released on November 6th, 2017 in Bitcoin Core version 0.15.1.
Bitcoin Core 0.18.1 Released
Bitcoin Core 0.18.1 is now available with bug fixes and other improvements.
Bitcoin Core 0.18.0 Released
We are pleased to release the next major version of Bitcoin Core, 0.18.0.
2018
Bitcoin Core 0.17.1 Released
Bitcoin Core 0.17.1, a maintenance release bringing bug fixes and minor improvements, is now available.
Bitcoin Core 0.17.0 Released
We’re pleased to announce the release of Bitcoin Core 0.17, a major new version containing many new features as well as bug fixes and other improvements.
Disclosure of CVE-2018-17144
Bitcoin Core was vulnerable to a DoS and inflation attack. A fix was released on September 18th, 2018 in Bitcoin Core versions 0.16.3 and 0.17.0rc4.
Bitcoin Core 0.16.3 Released
Bitcoin Core 0.16.3 is now available with a fix for a denial-of-service vulnerability affecting earlier versions of Bitcoin Core.
Bitcoin Core 0.16.2 Released
Bitcoin Core 0.16.2 is now available with new bug fixes and minor updates.
Bitcoin Core 0.16.1 Released
Bitcoin Core 0.16.1 has been released with the latest bug fixes and minor updates
Bitcoin Core 0.16.0 Released
Bitcoin Core 0.16.0 has been released with default wallet support for segwit.
2017
Bitcoin Core 0.15.1 Released
The latest stable version of Bitcoin Core is now available.
Bitcoin Core 0.15.0.1 Released
Bitcoin Core 0.15.0.1 has been released with a fix for a minor bug causing crashes when upgrading to 0.15.0.
Bitcoin Core 0.15.0 Released
The latest stable version of Bitcoin Core is now available.
Correcting misinformation on Segwit2x and btc1
Correcting misinformation on Segwit2x and btc1
Bitcoin Core 0.14.2 Released
Bitcoin Core 0.14.2 has been released with a security fix for users who manually enable the UPnP option.
Bitcoin Core 0.14.1 Released
The latest stable version of Bitcoin Core is now available.
Technology roadmap - Prioritized block download with using full block SPV mode
Prioritized block download with using full block SPV mode
Technology roadmap - Schnorr signatures and signature aggregation
Status and explanation of Schnorr signatures and signature aggregation
On-chain scaling - a review of historical performance optimization made to Bitcoin’s reference software. Part 1
Development milestones that helped preserve a reliable experience for users of the Bitcoin software client over the years.
Bitcoin Core 0.14.0 Released with Performance Improvements
Multiple significant performance improvements for miners and new full nodes are available in the latest Bitcoin Core release.
Bitcoin Core 0.13.2 Released
We are pleased to announce the general availability of the Bitcoin Core 0.13.2.
2016
Segregated Witness Costs and Risks
A summary of some of the costs and expected risks of deploying segregated witness.
Bitcoin Core 0.13.1 Released with Segregated Witness
The first release of Bitcoin Core that supports activation of segregated witness is now available.
Segregated Witness Upgrade Guide
Almost two years of iterative design, development, and testing has gone into the version of segwit being released in Bitcoin Core 0.13.1, with much of the ef...
Bitcoin Core 0.13.0 Released!
We’re pleased to announce the official release of Bitcoin Core 0.13.0.
Segregated witness: the next steps
Segregated witness (segwit) is approaching release. This post provides some background information, details about how segwit was tested, information about h...
CSV softfork - Important upgrade instructions for miners
There is an ongoing soft fork of the Bitcoin consensus rules. While everything appears to be proceeding well, this article contains important information and...
Version bits FAQ for miners
The “version bits” BIP9 system is a way to introduce backward compatible rule changes to the Bitcoin consensus rules, known as a soft fork.
Compact Blocks FAQ
Compact block relay, BIP152, is a method of reducing the amount of bandwidth used to propagate new blocks to full nodes.
Bitcoin Core 0.12.1 Released!
We are pleased to announce the release of Bitcoin Core 0.12.1. This maintenance update includes the first soft fork deployment utilising version bits
New Repository Maintainer Appointed
Hereby I’m announcing Marco Falke as the new Testing & QA maintainer for Bitcoin Core.
Keep updated!
In an effort to increase communications, we are now providing opt-in, announcement-only information for users of Bitcoin Core to receive notifications of sec...
The first successful Zero-Knowledge Contingent Payment
Announcement for the first Zero-Knowledge Contingent Payment on the Bitcoin network.
Bitcoin Core 0.12.0 Released!
We’re very excited to announce the official release of Bitcoin Core v0.12.0. A lot of hard work has gone into this release and it may just be the biggest one...
Clarifying Communications
Where to find official information about Bitcoin Core and how you can interact with other Bitcoin Core users and developers.
Segregated Witness Benefits
This page summarises some of the benefits of segregated witness.
Launch of Segregated Witness Testnet
We are extremely pleased and excited to announce the release of the Segregated Witness Testnet
Core Development Visualisation for 2015
The following video shows commit activity in the Bitcoin Core repository during 2015.
Statement from Bitcoin Core -- 2016-01-07
Bitcoin is a “peer-to-peer version of electronic cash that allows online payments to be sent directly from one party to another without going through a finan...
2015
Bitcoin Capacity Increases FAQ
Overview
Capacity increases for the Bitcoin system
We, the undersigned, support the roadmap in Capacity increases for the Bitcoin system. We have been working on scalability for several years within the Bitc...
Segregated Witness Video Presentation
This is the extended presentation of Segregated Witness by Pieter Wuille.
Capacity increases Roadmap for the Bitcoin system
The following roadmap was originally posted to the bitcoin-dev mailing list, by Gregory Maxwell on 2015-12-07.
An Open Letter to the Bitcoin Community
As active contributors to Bitcoin, we share this letter to communicate our plan of action related to technical consensus and Bitcoin scalability.
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