CVE-2025-59942
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedgo-f3 is a Golang implementation of Fast Finality for Filecoin (F3). In versions 0.8.6 and below, go-f3 panics when it validates a "poison" messages causing Filecoin nodes consuming F3 messages to become vulnerable. A "poison" message can can cause integer overflow in the signer index validation, which can cause the whole node to crash. These malicious messages aren't self-propagating since the bug is in the validator. An attacker needs to directly send the message to all targets. This issue is fixed in version 0.8.7.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidencego-f3 versions 0.8.6 and below contain a denial-of-service vulnerability where specially crafted 'poison' messages trigger an integer overflow during signer index validation, causing the Filecoin node to panic and crash. The attacker must directly send these malicious messages to target nodes.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 0.8.7CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify go-f3 versionRun 'go-f3 version' or check the binary/build manifest to determine the installed version of the go-f3 componentAffected if The version is 0.8.6 or below (anything less than 0.8.7)
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Confirm F3 subsystem is runningInspect the Filecoin node configuration or runtime status to verify whether the F3 (Filecoin Fault Fault) subsystem is enabled and actively runningAffected if F3 is enabled and running - the vulnerability only triggers when processing messages through the F3 subsystem
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Check F3 network exposureReview network listener configuration to determine if the F3 message endpoint is exposed to external/untrusted network connectionsAffected if F3 accepts messages from network peers - the attacker must be able to directly send malicious 'poison' messages to target nodes
You are affected if your go-f3 version is below 0.8.7 AND the F3 subsystem is running AND is reachable by attackers who can send specially crafted messages.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped0.8.7
Upgrade go-f3 to version 0.8.7 or later to patch the integer overflow vulnerability in signer index validation.
go-f3 v0.8.7
- 1. Identify all systems running go-f3 version 0.8.6 or below
- 2. Stop any running go-f3 services before upgrading
- 3. Update the go-f3 dependency to version 0.8.7 using: go get github.com/filecoin-project/[email protected]
- 4. Rebuild the project with the updated dependency
- 5. Verify the new version is running: go-f3 version or check logs for version info
- 6. Restart the go-f3 service
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,752.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-59942 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-59942 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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