{"id":"CVE-2022-3786","aliases":["BIT-node-2022-3786","BIT-node-min-2022-3786","GHSA-h8jm-2x53-xhp5","RUSTSEC-2022-0065"],"url":"https://o3.security/vulnerability/CVE-2022-3786","summary":"X.509 Email Address Variable Length Buffer Overflow","details":"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.\n\n","published":"2022-11-01T00:00:00Z","modified":"2026-08-12T03:51:24.935205179Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.92488,"percentile":0.99819,"asOf":"2026-09-11"},"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"crates.io","name":"openssl-src","fixedVersion":"300.0.11"}],"fix":null,"references":[{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/html/ssa-408105.html"},{"type":"WEB","url":"https://www.kb.cert.org/vuls/id/794340"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/3xxx/CVE-2022-3786.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-3786"},{"type":"ADVISORY","url":"https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00789.html"},{"type":"ADVISORY","url":"https://www.openssl.org/news/secadv/20221101.txt"},{"type":"FIX","url":"https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=c42165b5706e42f67ef8ef4c351a9a4c5d21639a"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:24.935205179Z"}}