CVE-2025-59942 go-f3 module vulnerable to integer overflow leading to panic
An attacker can crash Filecoin nodes by sending specially crafted messages that trigger an integer overflow in the go-f3 library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-59942?
CVE-2025-59942 is a high-severity vulnerability in filecoin-project go-f3, published on 29 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-190
Which versions are affected by CVE-2025-59942?
3 open source packages ship an affected version, including github.com/filecoin-project/go-f3. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/filecoin-project/go-f3 Go | All versions | 0.8.7 |
github.com/filecoin-project/go-f3 Go | All versions | 0.8.7 |
github.com/filecoin-project/go-f3 Go | All versions | 0.8.7 |
Products include Filecoin Go-F3.
How do I fix CVE-2025-59942?
Upgrade github.com/filecoin-project/go-f3 to 0.8.7 or later.
Is CVE-2025-59942 being exploited?
There is no known exploitation of CVE-2025-59942 in the wild and no public exploit code.
Other vulnerabilities in filecoin-project go-f3
Sources
Also known as GHSA-g99p-47x7-mq88, GO-2025-3990.