CVE-2022-30591Network attack vector

CPU exhaustion via incomplete QUIC requests

Published Jul 6, 2022 · Updated Aug 3, 2024

Denial of service in quic-go 0.27.0 and earlier allows remote attackers to exhaust CPU via incomplete QUIC or HTTP/3 requests. The reported Slowloris variant leaves requests incomplete while mtu_discoverer.go misparses MTU Discovery state and overflows the probe timer. The attack requires network access to a quic-go endpoint; the maintainer disputes that the behavior qualifies as a vulnerability.

CVSS severity7.5
High
EPSS probability2.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in quic-go 0.27.0 and earlier allows remote attackers to exhaust CPU via incomplete QUIC or HTTP/3 requests. The reported Slowloris variant leaves requests incomplete while mtu_discoverer.go misparses MTU Discovery state and overflows the probe timer. The attack requires network access to a quic-go endpoint; the maintainer disputes that the behavior qualifies as a vulnerability.

The record

CVE
CVE-2022-30591
Published
Jul 6, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.002Service Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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