Developers Patch High-Severity Vulnerabilities in Bitcoin Core Software
Flaws allowed mining interruptions and compromised security for Tor-connected nodes
Bitcoin Core has released patches for three security vulnerabilities found in the software that powers most of the Bitcoin network. The flaws involve denial-of-service and privacy issues, though they did not allow for the theft of coins or the unauthorized creation of assets.
The most severe vulnerability, identified as CVE-2025-62861, affected how miners create block templates. During a chain reorganization, the node's memory system could become corrupted, preventing the production of new blocks until the software was restarted.
Another identified error allowed incoming connections via the Tor network to receive improper trust permissions. This nullified essential privacy and security protections, leaving nodes vulnerable to third-party attacks.
A third flaw involved the manipulation of compact blocks to disrupt data processing by a node. Bitcoin Core has updated its security policy to address easily discoverable vulnerabilities, aiming to accelerate the resolution of issues that can be identified by automated tools.
No evidence has been found that these vulnerabilities were exploited by external agents. The fixes have already been implemented to ensure the stability of the network infrastructure.
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