CVE-2022-30591

** DISPUTED ** quic-go through 0.27.0 allows remote attackers to cause a denial of service (CPU...

7.5 HighPublic exploitDisputed

quic-go through 0.27.0 allows remote attackers to cause a denial of service (CPU consumption) via a Slowloris variant in which incomplete QUIC or HTTP/3 requests are sent. This occurs because mtu_discoverer.go misparses the MTU Discovery service and consequently overflows the probe timer. NOTE: the vendor's position is that this behavior should not be listed as a vulnerability on the CVE List

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

2.92%Up 2.0 points since Jul 7, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2022-30591
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-400
Updated: 2026-11-02

CVE List No score

Record: CVE-2022-30591
Updated: 2026-11-02

EUVDEUVD-2022-52434 No score

Record: EUVD-2022-52434
Updated: 2026-11-03

GitHub AdvisoriesGHSA-w2rh-hf85-pfh4 7.5

** DISPUTED ** quic-go through 0.27.0 allows remote attackers to cause a denial of service (CPU...

** DISPUTED ** quic-go through 0.27.0 allows remote attackers to cause a denial of service (CPU consumption) via a Slowloris variant in which incomplete QUIC or HTTP/3 requests are sent. This occurs because mtu_discoverer.go misparses the MTU Discovery service and consequently overflows the probe timer. NOTE: the vendor's position is that this behavior should not be listed as a vulnerability on the CVE List.

Record: GHSA-w2rh-hf85-pfh4
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400
Updated: 2026-11-02

OSVDEBIAN-CVE-2022-30591 7.5

Record: DEBIAN-CVE-2022-30591
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-03

OSV No score

Record: CVE-2022-30591
Updated: 2026-11-02

Affected products

quic-go project quic-go

Affected packages

Affected packages
Package	Affected	Fixed
`golang-github-lucas-clemente-quic-go` Debian:12	All versions, plus listed versions 0.29.0-10.29.2-10.29.2-20.29.2-30.37.0-1 Show 19 moreShow less 0.37.4-10.37.4-1~bpo12+10.38.2-10.38.2-20.46.0-10.46.0-20.46.0-2~bpo12+10.50.0-10.50.1-10.50.1-20.54.0-10.54.0-20.54.0-30.54.1-10.55.0-10.59.0-10.59.0-20.59.0-2~bpo13+10.64.1-1	None known
`golang-github-lucas-clemente-quic-go` Debian:13	All versions, plus listed versions 0.50.1-20.54.0-10.54.0-20.54.0-30.54.1-1 Show 5 moreShow less 0.55.0-10.59.0-10.59.0-20.59.0-2~bpo13+10.64.1-1	None known
`golang-github-lucas-clemente-quic-go` Debian:14	All versions, plus listed versions 0.50.1-20.54.0-10.54.0-20.54.0-30.54.1-1 Show 5 moreShow less 0.55.0-10.59.0-10.59.0-20.59.0-2~bpo13+10.64.1-1	None known

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	efchatz/QUIC-attacks	2022-06-30

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected	OSV
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-30591 is a high vulnerability (CVSS 7.5) in Quic-go Project Quic-go, published July 6, 2022. Its validity is disputed. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.92%, the 87th percentile.