Could a chain reorganization stop an affected miner from producing a valid block? According to an Odaily report published on November 11, 2026, at 10:03 a.m. UTC+8, Bitcoin News said on X that Bitcoin Core had disclosed a high-severity vulnerability with that possible effect.
The vulnerability, CVE-2025-62861, affects Bitcoin Core versions 28.0–28.2 and 29.0–29.1. Security researcher Niklas Goegge discovered it. Fixes were released in October 2025; the vulnerability details were made public on the report’s publication date.
The reported risk concerns affected miners after a chain reorganization. The brief report does not describe the failure mechanism or say that every affected miner would encounter it.