Bitcoin Core developers have disclosed a high-risk vulnerability, CVE-2024-52911, affecting versions 0.14.1 through 28.4. This vulnerability allows attackers to remotely crash other nodes and execute code by constructing special blocks. Discovered and privately reported by developer Cory Fields in November 2024, the vulnerability was patched in December 2024 and officially implemented in version v29 released in April 2025. The last vulnerable version in the 28.x series ceased maintenance on April 19, 2026. However, since Bitcoin node upgrades are voluntary, estimates suggest that approximately 43% of nodes are still running the affected older version, posing a potential security risk.