CVE-2022-42905Network attack vector

Service crash via TLS record header over-read

Published Nov 6, 2022 · Updated May 2, 2025

Out-of-bounds read in wolfSSL before 5.5.2 allows remote attackers to crash callback-enabled TLS 1.3 servers via crafted records. The TLS record-header parser reads five bytes past a heap buffer when a malicious client reaches instrumentation compiled with WOLFSSL_CALLBACKS. Only explicitly callback-enabled builds are exposed; this debug-only option is not activated by any other build setting.

CVSS severity9.1
Critical
EPSS probability2.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in wolfSSL before 5.5.2 allows remote attackers to crash callback-enabled TLS 1.3 servers via crafted records. The TLS record-header parser reads five bytes past a heap buffer when a malicious client reaches instrumentation compiled with WOLFSSL_CALLBACKS. Only explicitly callback-enabled builds are exposed; this debug-only option is not activated by any other build setting.

The record

CVE
CVE-2022-42905
Published
Nov 6, 2022
Updated
May 2, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, CAPEC-540, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 6, 2022CVE publishedPublication date reported by the CVE source.
  2. May 2, 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?

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

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CAPEC-540Overread Buffers
T1190Exploit Public-Facing Application

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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