CVE-2024-38365Network attack vector

Chain split via fuzzy signature removal

Published Oct 11, 2024 · Updated Oct 11, 2024

Consensus failure in btcsuite btcd before 0.24.2 allows remote attackers to split vulnerable nodes from the Bitcoin chain via a standard transaction. removeOpcodeByData removes every data push containing the signature bytes, while Bitcoin Core's FindAndDelete removes only exact matches, producing a different signature hash. Any Bitcoin user can relay the crafted standard transaction without hash power, causing an invalid-block chain split or rejection of a valid block that interrupts the node.

CVSS severity7.4
High
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Consensus failure in btcsuite btcd before 0.24.2 allows remote attackers to split vulnerable nodes from the Bitcoin chain via a standard transaction. removeOpcodeByData removes every data push containing the signature bytes, while Bitcoin Core's FindAndDelete removes only exact matches, producing a different signature hash. Any Bitcoin user can relay the crafted standard transaction without hash power, causing an invalid-block chain split or rejection of a valid block that interrupts the node.

The record

CVE
CVE-2024-38365
Published
Oct 11, 2024
Updated
Oct 11, 2024
Vendor
btcsuite
Product
btcd
Classifications
CWE-670, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 11, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.10.0, < 0.24.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

btcsuite · btcdversion=>= 0.10.0, < 0.24.2

Published CVSS scores

7.4GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-670Always-Incorrect Control Flow Implementation
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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