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Deep Tide TechFlow News, May 2nd, the Zcash Foundation officially announced the release of Zebra 4.4.0. This update fixes multiple consensus-critical security vulnerabilities and strongly recommends all node operators to upgrade immediately, including a denial-of-service vulnerability that can cause permanent stoppage of new block discovery, consensus splits caused by block signature operation (sigops) count errors, abnormal handling of transparent transaction signature hashes, and risks of memory allocation amplification attacks.
The Zcash Foundation stated that some of these vulnerabilities could cause Zebra nodes to accept blocks rejected by zcashd, leading to chain splits. If not updated promptly, nodes may face risks such as interrupted block discovery, consensus forks, and increased resource consumption, and currently, there are no alternative mitigation solutions.