Vulnerability · Published Oct 10, 2025 · Assigned by GitHub_M
CVE-2025-59530quic-go has Client Crash Due to Premature HANDSHAKE_DONE Frame
High 7.5
In plain English
A high-severity security flaw in quic-go from quic-go. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
quic-go is an implementation of the QUIC protocol in Go. In versions prior to 0.49.0, 0.54.1, and 0.55.0, a misbehaving or malicious server can cause a denial-of-service (DoS) attack on the quic-go client by triggering an assertion failure, leading to a process crash. This requires no authentication and can be exploited during the handshake phase. This was observed in the wild with certain server implementations. quic-go needs to be able to handle misbehaving server implementations, including those that prematurely send a HANDSHAKE_DONE frame. Versions 0.49.0, 0.54.1, and 0.55.0 discard Initial keys when receiving a HANDSHAKE_DONE frame, thereby correctly handling premature HANDSHAKE_DONE frames.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | golang-github-lucas-clemente-quic-go | no fix listed | DEBIAN-CVE-2025-59530 |
| Debian:13 | golang-github-lucas-clemente-quic-go | no fix listed | DEBIAN-CVE-2025-59530 |
| Debian:14 | golang-github-lucas-clemente-quic-go | 0.54.1-1 | DEBIAN-CVE-2025-59530 |
| Go | github.com/quic-go/quic-go | 0.49.1 | GHSA-47m2-4cr7-mhcw |
| Go | github.com/quic-go/quic-go | 0.54.1 | GHSA-47m2-4cr7-mhcw |
| Go | github.com/quic-go/quic-go | 0.49.1, 0.54.1 | GO-2025-4017 |
| Ubuntu:22.04:LTS | golang-github-lucas-clemente-quic-go | no fix listed | UBUNTU-CVE-2025-59530 |
| Ubuntu:24.04:LTS | golang-github-lucas-clemente-quic-go | no fix listed | UBUNTU-CVE-2025-59530 |
| Ubuntu:25.10 | golang-github-lucas-clemente-quic-go | no fix listed | UBUNTU-CVE-2025-59530 |
| Ubuntu:26.04:LTS | golang-github-lucas-clemente-quic-go | no fix listed | UBUNTU-CVE-2025-59530 |
Affected products (as reported)
Weakness: CWE-617, CWE-755 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/quic-go/quic-go/security/advisories/GHSA-47m2-4cr7-mhcw x_refsource_CONFIRM
- https://github.com/quic-go/quic-go/pull/5354 x_refsource_MISC
- https://github.com/quic-go/quic-go/blob/v0.55.0/connection.go#L2682-L2685 x_refsource_MISC