CVE-2024-35202

Name: CVE-2024-35202
Creator: NVD / NIST
Published: 2024-10-10T13:15:14.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2024-35202 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Bitcoin Core before 25.0 allows remote attackers to cause a denial of service (blocktxn message-handling assertion and node exit) by including transactions in a blocktxn message that are not committed to in a block's merkle root. FillBlock can be called twice for one PartiallyDownloadedBlock instance.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

Bitcoin Core before 25.0 allows remote attackers to cause a denial of service (blocktxn message-handling assertion and node exit) by including transactions in a blocktxn message that are not committed to in a block's merkle root. FillBlock can be called twice for one PartiallyDownloadedBlock instance.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.90%

55.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Bitcoin	Bitcoin Core	< 25.0

References

https://bitcoincore.org/en/2024/10/08/disclose-blocktxn-crash/Patch, Vendor Advisory
https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_ExposuresThird Party Advisory
https://github.com/bitcoin/bitcoin/blob/master/doc/release-notes/release-notes-25.0.mdRelease Notes
https://github.com/bitcoin/bitcoin/pull/26898Issue Tracking
https://github.com/bitcoin/bitcoin/releases/tag/v25.0Release Notes

Timeline

Published: Oct 10, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-35202?

How severe is CVE-2024-35202?

CVE-2024-35202 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2024-35202?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-35202?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST