What is CVE-2025-59942?

CVE-2025-59942 is a high-severity vulnerability in Filecoin Go-F3, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2025-09-29.

How severe is CVE-2025-59942?

High severity. CVSS v3 base score is 7.5 out of 10.

Integer overflow in Filecoin Go-F3

CVE-2025-59942

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 directly send the message to all targets. This issue is fixed in version 0.8.7.

Vulnerability class: Integer Overflow

EPSS: 0.003 (23.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Filecoin Go-f3
Filecoin-project Go-f3 — versions < 0.8.7

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2025-59942?: CVE-2025-59942 is a high-severity vulnerability in Filecoin Go-F3, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2025-09-29.
How severe is CVE-2025-59942?: High severity. CVSS v3 base score is 7.5 out of 10.