CVE-2025-59942: go-f3 is a Golang implementation of Fast Finality for Filecoin (F3)

Q: How do I fix CVE-2025-59942?

go-f3: upgrade to 0.8.7. Exact commands for each OS are on this page.

Q: Is CVE-2025-59942 being exploited?

CVE-2025-59942 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-59942 affect?

CVE-2025-59942 affects go-f3. Severity is high (CVSS 7.5). go-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 c

Q: How urgent is CVE-2025-59942?

Priority 38/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.5REMOTEUPGRADE

CVE-2025-59942 is a high-severity flaw (CVSS 7.5) affecting go-f3. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

go-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 direct

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-190
Published	2025-09-29
Last modified	2026-10-09

Publisher (CNA): GitHub, Inc. · Vendor: filecoin

Last updated 2026-10-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-29 23:15 UTCPublished CVE record published
2026-10-09 09:10 UTCUpdated Record last modified

filecoin go-f3 UPGRADE

Affected: < 0.8.7

Fixed in: 0.8.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy go-f3 || rpm -q go-f3 || go-f3 --version

2. UPGRADE to 0.8.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade go-f3

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade go-f3

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-59942?

go-f3: upgrade to 0.8.7. Exact commands for each OS are on this page.

Is CVE-2025-59942 being exploited?

CVE-2025-59942 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-59942 affect?

CVE-2025-59942 affects go-f3. Severity is high (CVSS 7.5). go-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 c

How urgent is CVE-2025-59942?

Priority 38/100. High severity; Remotely exploitable, no login, no user action

Software pages

Go (Golang) vulnerabilities

Related CVEs

CVE-2025-59941 MEDIUM 5.9 UPGRADE go-f3 is a Golang implementation of Fast Finality for Filecoin (F3)

References

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