CVE-2026-42764

{"id": "CVE-2026-42764", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42764", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-09T19:36:40.693568Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "openssl-security@openssl.org", "affectedData": [{"vendor": "OpenSSL", "product": "OpenSSL", "versions": [{"status": "affected", "version": "4.0.0", "lessThan": "4.0.1", "versionType": "semver"}, {"status": "affected", "version": "3.6.0", "lessThan": "3.6.3", "versionType": "semver"}, {"status": "affected", "version": "3.5.0", "lessThan": "3.5.7", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-06-09T17:17:07.693", "references": [{"url": "https://github.com/openssl/openssl/commit/5e3ed291b8af0b03d5d3b9e56a1da69a187e9729", "tags": ["Patch"], "source": "openssl-security@openssl.org"}, {"url": "https://github.com/openssl/openssl/commit/a45a0aba8095682c88ff4fc4a784892b8c6f0677", "tags": ["Patch"], "source": "openssl-security@openssl.org"}, {"url": "https://github.com/openssl/openssl/commit/bf29a458c1a231eca87e384c62b9c2553fa57a91", "tags": ["Patch"], "source": "openssl-security@openssl.org"}, {"url": "https://openssl-library.org/news/secadv/20260609.txt", "tags": ["Vendor Advisory"], "source": "openssl-security@openssl.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "openssl-security@openssl.org", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "Issue summary: Receiving a QUIC initial packet with an invalid token may\ntrigger a NULL pointer dereference in the OpenSSL QUIC server with\naddress validation disabled.\n\nImpact summary: NULL pointer dereference typically causes abnormal termination\nof the affected QUIC server process and a Denial of Service.\n\nIf the address validation is disabled in the OpenSSL QUIC server\nimplementation, an attacker can crash the server by sending an initial\npacket with an invalid or expired token.\n\nBy default, the client address validation is enabled in the OpenSSL QUIC server\nimplementation, which makes the default configuration not vulnerable\nto this issue. However if the SSL_LISTENER_FLAG_NO_VALIDATE is used with\nthe SSL_new_listener() call, the address validation is disabled making the\nvulnerable code reachable.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this\nissue, as the affected code is outside the OpenSSL FIPS module boundary."}, {"lang": "es", "value": "Resumen del problema: Recibir un paquete inicial QUIC con un token inv\u00e1lido puede desencadenar una desreferencia de puntero NULL en el servidor QUIC de OpenSSL con la validaci\u00f3n de direcciones deshabilitada.\n\nResumen del impacto: La desreferencia de puntero NULL t\u00edpicamente causa la terminaci\u00f3n anormal del proceso del servidor QUIC afectado y una denegaci\u00f3n de servicio.\n\nSi la validaci\u00f3n de direcciones est\u00e1 deshabilitada en la implementaci\u00f3n del servidor QUIC de OpenSSL, un atacante puede bloquear el servidor enviando un paquete inicial con un token inv\u00e1lido o caducado.\n\nPor defecto, la validaci\u00f3n de direcciones del cliente est\u00e1 habilitada en la implementaci\u00f3n del servidor QUIC de OpenSSL, lo que hace que la configuraci\u00f3n predeterminada no sea vulnerable a este problema. Sin embargo, si se utiliza SSL_LISTENER_FLAG_NO_VALIDATE con la llamada a SSL_new_listener(), la validaci\u00f3n de direcciones se deshabilita, haciendo que el c\u00f3digo vulnerable sea accesible.\n\nLos m\u00f3dulos FIPS en 4.0, 3.6, 3.5, 3.4 y 3.0 no se ven afectados por este problema, ya que el c\u00f3digo afectado est\u00e1 fuera del l\u00edmite del m\u00f3dulo FIPS de OpenSSL."}], "lastModified": "2026-07-23T08:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6B6B9930-C549-4D88-9784-AF32CCDDB87A", "versionEndExcluding": "3.5.7", "versionStartIncluding": "3.5.0"}, {"criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D41B3C45-EC73-4DC8-989D-B2E2792E102F", "versionEndExcluding": "3.6.3", "versionStartIncluding": "3.6.0"}, {"criteria": "cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6E881B9A-1A0A-4BC0-8160-20C00561167D"}], "operator": "OR"}]}], "sourceIdentifier": "openssl-security@openssl.org"}