CVE-2025-54605Network attack vector

Disk exhaustion via unbounded invalid-block logging

Published Oct 28, 2025 · Updated Oct 28, 2025

Uncontrolled log growth in Bitcoin Core 29.0 and earlier allows remote attackers to exhaust node disk space via repeated invalid blocks. The block-processing path writes an unconditional log entry when a block fails basic sanity checks or branches before the last checkpoint. No authentication or user interaction is required, but disk exhaustion requires sustained delivery because the fill rate is slow.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled log growth in Bitcoin Core 29.0 and earlier allows remote attackers to exhaust node disk space via repeated invalid blocks. The block-processing path writes an unconditional log entry when a block fails basic sanity checks or branches before the last checkpoint. No authentication or user interaction is required, but disk exhaustion requires sustained delivery because the fill rate is slow.

The record

CVE
CVE-2025-54605
Published
Oct 28, 2025
Updated
Oct 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/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-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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