What’s Vulnerable › Vulnerabilities

CVE-2024-52921

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-11-18 · updated 2026-06-17
• Weakness: CWE-862

Description

In Bitcoin Core before 25.0, a peer can affect the download state of other peers by sending a mutated block.

Affected products

• Bitcoin Core: before 25.0 — fixed in 25.0

How to fix

Upgrade to a fixed version: Bitcoin Core 25.0. Check the vendor advisory for mitigations.

References

• https://bitcoincore.org/en/2024/10/08/disclose-mutated-blocks-hindering-propagation/
• https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures

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