CVE-2022-41724Network attack vector

Application crashes via oversized TLS handshake records

Published Feb 28, 2023 · Updated Mar 7, 2025

Denial of service in Go standard library crypto/tls before 1.19.6 and 1.20.0-0 through 1.20.0 allows remote attackers to crash applications. Conn handshake processing accepts a large peer-supplied handshake record and panics while constructing the corresponding response; the public patch record does not disclose the narrower failing operation. Exposure covers all TLS 1.3 clients, TLS 1.2 clients with session resumption enabled, and TLS 1.3 servers requesting client certificates.

CVSS severity7.5
High
EPSS probability1.11%
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 Go standard library crypto/tls before 1.19.6 and 1.20.0-0 through 1.20.0 allows remote attackers to crash applications. Conn handshake processing accepts a large peer-supplied handshake record and panics while constructing the corresponding response; the public patch record does not disclose the narrower failing operation. Exposure covers all TLS 1.3 clients, TLS 1.2 clients with session resumption enabled, and TLS 1.3 servers requesting client certificates.

The record

CVE
CVE-2022-41724
Published
Feb 28, 2023
Updated
Mar 7, 2025
Vendor
Go standard library
Product
crypto/tls
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.19.6
  2. Affected versionversion=1.20.0-0 <1.20.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · crypto/tlsversion=0 <1.19.6; version=1.20.0-0 <1.20.1

Published CVSS scores

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.

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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
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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