CVE-2024-52919Network attack vector

Remote node crash via address identifier overflow

Published Nov 18, 2024 · Updated Nov 18, 2024

Integer overflow in Bitcoin Core before 22.0 allows remote attackers to crash a node by flooding it with addr messages. CAddrMan increments its 32-bit nIdCount for every address-manager insertion and reuses the value as the new entry's identifier. Any unauthenticated peer able to sustain enough addr-message insertions can overflow the counter, trigger an assertion, and terminate the daemon.

CVSS severity6.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Bitcoin Core before 22.0 allows remote attackers to crash a node by flooding it with addr messages. CAddrMan increments its 32-bit nIdCount for every address-manager insertion and reuses the value as the new entry's identifier. Any unauthenticated peer able to sustain enough addr-message insertions can overflow the counter, trigger an assertion, and terminate the daemon.

The record

CVE
CVE-2024-52919
Published
Nov 18, 2024
Updated
Nov 18, 2024
Vendor
Bitcoin
Product
Bitcoin Core
Classifications
CWE-190, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 18, 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 <22.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bitcoin · Bitcoin Coreversion=0 <22.0

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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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-190Integer Overflow or Wraparound
T1499.002Service Exhaustion Flood

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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