VULNERABILITY INTELLIGENCE

CVE-2019-25220

CVSS score7.5 HIGH
EPSS probability0.82%
CISA KEVNot currently listed
Published2024-11-18
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Bitcoin Core before 24.0.1 allows remote attackers to cause a denial of service (daemon crash) via a flood of low-difficulty header chains (aka a "Chain Width Expansion" attack) because a node does not first verify that a presented chain has enough work before committing to store it.

Weakness classification

  • CWE-770: Allocation of Resources Without Limits or Throttling

Primary references