--- title: "CVE-2022-3602: X.509 Email Address 4-byte Buffer Overflow | CubePath" description: "A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate…" language: en source: https://cubepath.com/security/cve/CVE-2022-3602 --- # CVE-2022-3602: X.509 Email Address 4-byte Buffer Overflow | CubePath ## Description 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 the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow four attacker-controlled bytes on the stack. This buffer overflow could result in a crash (causing a denial of service) or potentially remote code execution. Many platforms implement stack overflow protections which would mitigate against the risk of remote code execution. The risk may be further mitigated based on stack layout for any given platform/compiler. Pre-announcements of CVE-2022-3602 described this issue as CRITICAL. Further analysis based on some of the mitigating factors described above have led this to be downgraded to HIGH. Users are still encouraged to upgrade to a new version as soon as possible. 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. Fixed in OpenSSL 3.0.7 (Affected 3.0.0,3.0.1,3.0.2,3.0.3,3.0.4,3.0.5,3.0.6). Official description from the CVE record, published by openssl. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2022-3602) ## Key data ### CVSS 3.1 High 7.5 Score published by CISA-ADP in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | None | No effect on the secrecy of data. | | Integrity impact | None | No effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.90770 (90.8% probability) Percentile 99.8% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA assessment as of Apr 23, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Automatable yes Technical impact partial ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-787](https://cwe.mitre.org/data/definitions/787.html) Out-of-bounds Write ## Affected products Products listed in the CVE record, as the CNA published them. - OpenSSL - affected: Fixed in OpenSSL 3.0.7 (Affected 3.0.0,3.0.1,3.0.2,3.0.3,3.0.4,3.0.5,3.0.6) ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [openssl.org/news/secadv/20221101.txt](https://www.openssl.org/news/secadv/20221101.txt) - [git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=fe…](https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=fe3b639dc19b325846f4f6801f2f4604f56e3de3) - [\[oss-security\] 20221101 OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/01/15) (openwall.com) mailing-list - [\[oss-security\] 20221101 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/01/16) (openwall.com) mailing-list - [20221028 Vulnerabilities in OpenSSL Affecting Cisco Products: November 2022](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-W9sdCc2a) (tools.cisco.com) vendor-advisory - [\[oss-security\] 20221101 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/01/21) (openwall.com) mailing-list - [\[oss-security\] 20221101 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/01/19) (openwall.com) mailing-list - [\[oss-security\] 20221101 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/01/18) (openwall.com) mailing-list - [\[oss-security\] 20221101 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/01/20) (openwall.com) mailing-list - [\[oss-security\] 20221101 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/01/24) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/01/17) (openwall.com) mailing-list - [GLSA-202211-01](https://security.gentoo.org/glsa/202211-01) (security.gentoo.org) vendor-advisory - [psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0023](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0023) - [VU#794340](https://www.kb.cert.org/vuls/id/794340) (kb.cert.org) third-party-advisory - [FEDORA-2022-0f1d2e0537](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DWP23EZYOBDJQP7HP4YU7W2ABU2YDITS/) (lists.fedoraproject.org) vendor-advisory - [FEDORA-2022-502f096dce](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/63YRPWPUSX3MBHNPIEJZDKQT6YA7UF6S/) (lists.fedoraproject.org) vendor-advisory - [\[oss-security\] 20221101 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/2) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/6) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/5) (openwall.com) mailing-list - [\[oss-security\] 20221101 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/1) (openwall.com) mailing-list - [\[oss-security\] 20221101 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/3) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/7) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: Fwd: Node.js security updates for all active release lines, November 2022](http://www.openwall.com/lists/oss-security/2022/11/02/10) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/9) (openwall.com) mailing-list - [packetstormsecurity.com/files/169687/OpenSSL-Security-Advis…](http://packetstormsecurity.com/files/169687/OpenSSL-Security-Advisory-20221101.html) - [\[oss-security\] 20221102 Re: Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/12) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/11) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/15) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/14) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/02/13) (openwall.com) mailing-list - [security.netapp.com/advisory/ntap-20221102-0001](https://security.netapp.com/advisory/ntap-20221102-0001/) - [\[oss-security\] 20221102 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/03/1) (openwall.com) mailing-list - [\[oss-security\] 20221102 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/03/2) (openwall.com) mailing-list - [\[oss-security\] 20221103 Re: Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/03/3) (openwall.com) mailing-list - [\[oss-security\] 20221103 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/03/5) (openwall.com) mailing-list - [\[oss-security\] 20221103 Re: Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/03/7) (openwall.com) mailing-list - [\[oss-security\] 20221103 Re: Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/03/6) (openwall.com) mailing-list - [\[oss-security\] 20221103 Re: Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/03/9) (openwall.com) mailing-list - [\[oss-security\] 20221103 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/03/10) (openwall.com) mailing-list - [\[oss-security\] 20221103 Re: OpenSSL X.509 Email Address 4-byte Buffer Overflow (CVE-2022-3602), X.509 Email Address Variable Length Buffer Overflow (CVE-2022-3786)](http://www.openwall.com/lists/oss-security/2022/11/03/11) (openwall.com) mailing-list - [intel.com/content/www/us/en/security-center/advisory/intel-…](https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00789.html) ## Timeline 1. ID reserved Oct 19, 2022 2. Record published Nov 1, 2022 3. Record last updated Apr 14, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:59 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)