Description
quic-go is an implementation of the QUIC protocol in Go. Starting in version 0.37.0 and prior to version 0.37.3, by serializing an ACK frame after the CRYTPO that allows a node to complete the handshake, a remote node could trigger a nil pointer dereference (leading to a panic) when the node attempted to drop the Handshake packet number space. An attacker can bring down a quic-go node with very minimal effort. Completing the QUIC handshake only requires sending and receiving a few packets. Version 0.37.3 contains a patch. Versions before 0.37.0 are not affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| quic-go | quic-go | >= 0.37.0, < 0.37.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | golang-github-lucas-clemente-quic-go | No fix yet | — |
| Ubuntu 26.04 LTS | golang-github-lucas-clemente-quic-go | No fix yet | — |
| Ubuntu 25.10 | golang-github-lucas-clemente-quic-go | No fix yet | — |
| Ubuntu 24.04 LTS | golang-github-lucas-clemente-quic-go | No fix yet | — |
| Ubuntu 22.04 LTS | golang-github-lucas-clemente-quic-go | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/quic-go/quic-go | >= 0.37.0, < 0.37.3 | 0.37.3 | GHSA-3q6m-v84f-6p9h |