CVE-2025-59942Network attack vector

Node crash via signer-index integer overflow

Published Sep 29, 2025 · Updated Sep 29, 2025

Integer overflow in Filecoin go-f3 before 0.8.7 allows remote attackers to crash nodes with a crafted F3 justification message. Signer-index validation accumulates justification power without first bounding the sum against math.MaxInt64, so a poison message overflows and triggers a panic. No privileges or user interaction are required, but the non-propagating message must be delivered directly to each target node.

CVSS severity7.5
High
EPSS probability0.34%
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 Filecoin go-f3 before 0.8.7 allows remote attackers to crash nodes with a crafted F3 justification message. Signer-index validation accumulates justification power without first bounding the sum against math.MaxInt64, so a poison message overflows and triggers a panic. No privileges or user interaction are required, but the non-propagating message must be delivered directly to each target node.

The record

CVE
CVE-2025-59942
Published
Sep 29, 2025
Updated
Sep 29, 2025
Vendor
Filecoin
Product
go-f3
Classifications
CWE-190, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 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?

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

  1. Affected versionversion=< 0.8.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Filecoin · go-f3version=< 0.8.7

Published CVSS scores

7.5GitHub, Inc.CVSS: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-190Integer Overflow or Wraparound
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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