# CVE-2022-3786: OpenSSL: CVE-2022-3786 X.509 certificate verification buffer overrun CVE-2022-3786 is fixed in 21 products on 2 platforms, first by libssl3 3.0.2-0ubuntu1.7, released October 31, 2022. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2022-3786 - Priority: Urgent - CVSS: 7.5 (High) - EPSS: 0.9249 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation More Likely - Published: Oct 31, 2022 - Weakness: CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-3786 ## 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 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Node.js 18 | 18.12.1 | [Node.js 18 18.12.1](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.18-18.12.1.md) | Nov 4, 2022 | | Windows apps | Node.js 19 | 19.0.1 | [Node.js 19 19.0.1](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.19-19.0.1.md) | Nov 4, 2022 | | Linux | libssl3 Ubuntu 22.04.1 LTS (jammy) | 3.0.2-0ubuntu1.7 | [libssl3 3.0.2-0ubuntu1.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libssl3-3.0.2-0ubuntu1.7.md) | Oct 31, 2022 | | Linux | libssl3t64 Ubuntu 24.10 (oracular) | 3.0.5-2ubuntu2 | [libssl3t64 3.0.5-2ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libssl3t64-3.0.5-2ubuntu2.md) | Nov 1, 2022 | | Linux | libssl3t64 Ubuntu 25.04 (plucky) | 3.0.5-2ubuntu2 | [libssl3t64 3.0.5-2ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libssl3t64-3.0.5-2ubuntu2.md) | Nov 1, 2022 | | Linux | nodejs amzn 2023 | 1:18.12.1-1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | | Linux | nodejs-debuginfo amzn 2023 | 1:18.12.1-1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | | Linux | nodejs-debugsource amzn 2023 | 1:18.12.1-1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | | Linux | nodejs-devel amzn 2023 | 1:18.12.1-1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | | Linux | nodejs-docs amzn 2023 | 1:18.12.1-1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | | Linux | nodejs-full-i18n amzn 2023 | 1:18.12.1-1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | | Linux | nodejs-libs amzn 2023 | 1:18.12.1-1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | | Linux | nodejs-libs-debuginfo amzn 2023 | 1:18.12.1-1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | | Linux | npm amzn 2023 | 1:8.19.2-1.18.12.1.1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | | Linux | openssl Debian 12.15 (bookworm) | 3.0.7-1 | [DEBIAN-CVE-2022-3786](https://patchblox.com/security/data/fix/linux/debian-cve-2022-3786.md) | Nov 1, 2022 | | Linux | openssl Debian 13.5 (trixie) | 3.0.7-1 | [DEBIAN-CVE-2022-3786](https://patchblox.com/security/data/fix/linux/debian-cve-2022-3786.md) | Nov 1, 2022 | | Linux | openssl Debian 14 | 3.0.7-1 | [DEBIAN-CVE-2022-3786](https://patchblox.com/security/data/fix/linux/debian-cve-2022-3786.md) | Nov 1, 2022 | | Linux | openssl RHEL 9 | 1:3.0.1-43.el9_0 | [RHSA-2022:7288](https://patchblox.com/security/data/fix/linux/rhsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl Ubuntu 22.04.1 LTS (jammy) | 3.0.2-0ubuntu1.7 | [openssl 3.0.2-0ubuntu1.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-openssl-3.0.2-0ubuntu1.7.md) | Oct 31, 2022 | | Linux | openssl Ubuntu 24.10 (oracular) | 3.0.5-2ubuntu2 | [openssl 3.0.5-2ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openssl-3.0.5-2ubuntu2.md) | Nov 1, 2022 | | Linux | openssl Ubuntu 25.04 (plucky) | 3.0.5-2ubuntu2 | [openssl 3.0.5-2ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openssl-3.0.5-2ubuntu2.md) | Nov 1, 2022 | | Linux | openssl almalinux 9 | 1:3.0.1-43.el9_0 | [ALSA-2022:7288](https://patchblox.com/security/data/fix/linux/alsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl amzn 2023 | 1:3.0.5-1.amzn2023.0.4 | [ALAS2023-2023-051](https://patchblox.com/security/data/fix/linux/alas2023-2023-051.md) | Feb 17, 2023 | | Linux | openssl ol 9 | 1:3.0.1-43.0.1.el9_0 | [ELSA-2022-7288](https://patchblox.com/security/data/fix/linux/elsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl rocky 9 | 1:3.0.1-43.el9_0 | [RLSA-2022:7288](https://patchblox.com/security/data/fix/linux/rlsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl-debuginfo amzn 2023 | 1:3.0.5-1.amzn2023.0.4 | [ALAS2023-2023-051](https://patchblox.com/security/data/fix/linux/alas2023-2023-051.md) | Feb 17, 2023 | | Linux | openssl-debugsource amzn 2023 | 1:3.0.5-1.amzn2023.0.4 | [ALAS2023-2023-051](https://patchblox.com/security/data/fix/linux/alas2023-2023-051.md) | Feb 17, 2023 | | Linux | openssl-devel RHEL 9 | 1:3.0.1-43.el9_0 | [RHSA-2022:7288](https://patchblox.com/security/data/fix/linux/rhsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl-devel almalinux 9 | 1:3.0.1-43.el9_0 | [ALSA-2022:7288](https://patchblox.com/security/data/fix/linux/alsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl-devel amzn 2023 | 1:3.0.5-1.amzn2023.0.4 | [ALAS2023-2023-051](https://patchblox.com/security/data/fix/linux/alas2023-2023-051.md) | Feb 17, 2023 | | Linux | openssl-devel ol 9 | 1:3.0.1-43.0.1.el9_0 | [ELSA-2022-7288](https://patchblox.com/security/data/fix/linux/elsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl-libs RHEL 9 | 1:3.0.1-43.el9_0 | [RHSA-2022:7288](https://patchblox.com/security/data/fix/linux/rhsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl-libs almalinux 9 | 1:3.0.1-43.el9_0 | [ALSA-2022:7288](https://patchblox.com/security/data/fix/linux/alsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl-libs amzn 2023 | 1:3.0.5-1.amzn2023.0.4 | [ALAS2023-2023-051](https://patchblox.com/security/data/fix/linux/alas2023-2023-051.md) | Feb 17, 2023 | | Linux | openssl-libs ol 9 | 1:3.0.1-43.0.1.el9_0 | [ELSA-2022-7288](https://patchblox.com/security/data/fix/linux/elsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl-libs-debuginfo amzn 2023 | 1:3.0.5-1.amzn2023.0.4 | [ALAS2023-2023-051](https://patchblox.com/security/data/fix/linux/alas2023-2023-051.md) | Feb 17, 2023 | | Linux | openssl-perl RHEL 9 | 1:3.0.1-43.el9_0 | [RHSA-2022:7288](https://patchblox.com/security/data/fix/linux/rhsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl-perl almalinux 9 | 1:3.0.1-43.el9_0 | [ALSA-2022:7288](https://patchblox.com/security/data/fix/linux/alsa-2022-7288.md) | Nov 1, 2022 | | Linux | openssl-perl amzn 2023 | 1:3.0.5-1.amzn2023.0.4 | [ALAS2023-2023-051](https://patchblox.com/security/data/fix/linux/alas2023-2023-051.md) | Feb 17, 2023 | | Linux | openssl-perl ol 9 | 1:3.0.1-43.0.1.el9_0 | [ELSA-2022-7288](https://patchblox.com/security/data/fix/linux/elsa-2022-7288.md) | Nov 1, 2022 | | Linux | v8-devel amzn 2023 | 2:10.2.154.15-1.18.12.1.1.amzn2023.0.2 | [ALAS2023-2023-084](https://patchblox.com/security/data/fix/linux/alas2023-2023-084.md) | Feb 17, 2023 | --- Data as of 2026-11-08T00:53:09Z UTC. 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