CVE-2022-30591

Name: CVE-2022-30591
Creator: NVD / NIST
Published: 2022-07-06T12:15:08.173+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.41%

Last modified Jun 17, 2026

CVE-2022-30591 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 2.41% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.41%

82.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Quic-Go Project	Quic-Go	<= 0.27.0

References

https://github.com/lucas-clemente/quic-go/blob/84e03e59760ceee37359688871bb0688fcc4e98f/mtu_discoverer.goExploit, Third Party Advisory
https://github.com/lucas-clemente/quic-go/blob/84e03e59760ceee37359688871bb0688fcc4e98f/mtu_discoverer.goExploit, Third Party Advisory

Timeline

Published: Jul 6, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-30591?

How severe is CVE-2022-30591?

CVE-2022-30591 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.41% probability of exploitation in the next 30 days.

How do I fix CVE-2022-30591?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-30591?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST