{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42764", "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "state": "PUBLISHED", "assignerShortName": "openssl", "dateReserved": "2026-04-29T09:22:27.967Z", "datePublished": "2026-06-09T16:03:25.161Z", "dateUpdated": "2026-06-10T07:47:58.940Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "OpenSSL", "vendor": "OpenSSL", "versions": [{"lessThan": "4.0.1", "status": "affected", "version": "4.0.0", "versionType": "semver"}, {"lessThan": "3.6.3", "status": "affected", "version": "3.6.0", "versionType": "semver"}, {"lessThan": "3.5.7", "status": "affected", "version": "3.5.0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Sunwoo Lee (KENTECH)"}, {"lang": "en", "type": "reporter", "value": "Hyuk Lim (KENTECH)"}, {"lang": "en", "type": "reporter", "value": "Seunghyun Yoon (KENTECH)"}, {"lang": "en", "type": "remediation developer", "value": "Sunwoo Lee (KENTECH)"}, {"lang": "en", "type": "remediation developer", "value": "Hyuk Lim (KENTECH)"}, {"lang": "en", "type": "remediation developer", "value": "Seunghyun Yoon (KENTECH)"}], "datePublic": "2026-06-09T14:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Issue summary: Receiving a QUIC initial packet with an invalid token may<br>trigger a NULL pointer dereference in the OpenSSL QUIC server with<br>address validation disabled.<br><br>Impact summary: NULL pointer dereference typically causes abnormal termination<br>of the affected QUIC server process and a Denial of Service.<br><br>If the address validation is disabled in the OpenSSL QUIC server<br>implementation, an attacker can crash the server by sending an initial<br>packet with an invalid or expired token.<br><br>By default, the client address validation is enabled in the OpenSSL QUIC server<br>implementation, which makes the default configuration not vulnerable<br>to this issue. 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