Bitcoin Core 31.1. This update, which focuses on maintenance and restoration, focuses on the privacy protection and operational stability of nodes and has a more direct impact on users of long-term operating nodes.
Fix node IP leak
The new version has been restored. - Privatebroadcast. The problem of leaking the IP address under the function. The publication notes indicate that, under certain conditions, the privacy mechanism fails to transmit data as safely as expected and may expose network information of nodal operators.
This restoration relates primarily to the protection of privacy in the context of commercial broadcasting. For nodal users who rely on relevant configurations to hide network sources, updates reduce the risk of information leakage.
Process disk overreading and writing
31.1 The version also rehabilitated a problem in the database engine. Previously, LevelDB could lead to too many disk operations, thus increasing the hardware burden and affecting the stability of the node in its long run.
Such issues do not relate to the bitcoin consensus rule per se, but may affect the efficiency of the operation of node software, especially in an environment where storage performance is limited or equipment continues online.
Wallet module sync maintenance
In addition to privacy and database restoration, the development team maintained the wallet module, including a BDB page check during the migration, as well as the revision of the input size estimation.
The article mentions that nodal operators need to completely close the operational nodes before installing new versions of binary files to apply the security and performance improvements resulting from this update.