Bitcoin Core Discloses High-Severity Vulnerability That Can Prevent Nodes from Producing Blocks

According to a report by TechFlow on November 11, based on a Bitcoin Core security advisory, high-severity vulnerability CVE-2025-62861 can cause mempool state inconsistency during chain reorganizations, preventing affected miner nodes from creating block templates until the node is restarted.

The advisory stated that transactions re-added to the mempool after a reorganization may trigger TRUC sibling transaction eviction, removing a transaction while leaving its descendants behind. The vulnerability affects versions 28.0 through 28.2 and 29.0 through 29.1; versions 30.0, 29.2, and 28.3, which include the fix, were released on October 10, 14, and 17, 2025, respectively.

Source: TechFlow