A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address in a certificate to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service). In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-h8jm-2x53-xhp5 X.509 Email Address Variable Length Buffer Overflow
Ubuntu USN Ubuntu USN USN-5710-1 OpenSSL vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 04 Nov 2025 20:30:00 +0000


Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.17317}

epss

{'score': 0.2467}


Tue, 15 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.15327}

epss

{'score': 0.17317}


Mon, 05 May 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: openssl

Published:

Updated: 2025-11-04T19:13:08.687Z

Reserved: 2022-11-01T00:00:00.000Z

Link: CVE-2022-3786

cve-icon Vulnrichment

Updated: 2025-11-04T19:13:08.687Z

cve-icon NVD

Status : Modified

Published: 2022-11-01T18:15:11.047

Modified: 2025-11-04T20:16:04.950

Link: CVE-2022-3786

cve-icon Redhat

Severity : Important

Publid Date: 2022-11-01T00:00:00Z

Links: CVE-2022-3786 - Bugzilla

cve-icon OpenCVE Enrichment

No data.