CVE-2022-48437Network attack vector

Certificate verification error misreporting via discarded leaf errors

Published Apr 12, 2023 · Updated Feb 10, 2025

Improper certificate validation in LibreSSL before 3.6.1 and OpenBSD 7.2 before errata 001 allows remote attackers to cause incorrect errors. The x509_verify_ctx_add_chain function clears the context error without copying a continued leaf-certificate failure into cert_errors[0]. An installed verification callback must continue after detecting an invalid certificate, causing callers to receive an unreliable verification result.

CVSS severity5.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper certificate validation in LibreSSL before 3.6.1 and OpenBSD 7.2 before errata 001 allows remote attackers to cause incorrect errors. The x509_verify_ctx_add_chain function clears the context error without copying a continued leaf-certificate failure into cert_errors[0]. An installed verification callback must continue after detecting an invalid certificate, causing callers to receive an unreliable verification result.

The record

CVE
CVE-2022-48437
Published
Apr 12, 2023
Updated
Feb 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-295
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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-295Improper Certificate Validation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo