CVE-2026-48040

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This fallback occurs when `sun.misc.Unsafe` is unavailable to Netty \u2014 for example, when the JVM is started with `-Dio.netty.noUnsafe=true`, when a SecurityManager restricts Unsafe access, or when running on non-HotSpot JVMs. In these configurations, Netty's default `PooledByteBufAllocator` returns `PooledDirectByteBuf` instances for which `hasMemoryAddress()` returns false. Under the enabling JVM configuration, an unauthenticated network attacker can cause the OHTTP gateway to corrupt memory belonging to other concurrent connections and disclose the contents of adjacent pooled direct buffers by triggering cryptographic operations with crafted OHTTP requests. The corruption occurs regardless of whether the AEAD tag verification succeeds, as BoringSSL zeroizes the output buffer on failure. The information disclosure path provides the attacker with the encryption key needed to extract the leaked data. This violates the confidentiality and integrity of all connections sharing the same Netty buffer arena. Version 0.0.22.Final fixes the issue."}, {"lang": "es", "value": "El netty incubator codec.bhttp es un analizador HTTP binario en lenguaje Java. La biblioteca implementa Oblivious HTTP (RFC 9458) utilizando la biblioteca C HPKE de BoringSSL a trav\u00e9s de JNI. Al derivar direcciones de memoria nativas para operaciones criptogr\u00e1ficas, las versiones anteriores a 0.0.22.Final proporcionan una ruta de respaldo para ByteBufs directos que no exponen su direcci\u00f3n de memoria a trav\u00e9s de hasMemoryAddress(). Este respaldo ocurre cuando sun.misc.Unsafe no est\u00e1 disponible para Netty - por ejemplo, cuando la JVM se inicia con -Dio.netty.noUnsafe=true, cuando un SecurityManager restringe el acceso a Unsafe, o cuando se ejecuta en JVMs que no son HotSpot. En estas configuraciones, el PooledByteBufAllocator predeterminado de Netty devuelve instancias de PooledDirectByteBuf para las cuales hasMemoryAddress() devuelve false. Bajo la configuraci\u00f3n de JVM habilitadora, un atacante de red no autenticado puede hacer que la pasarela OHTTP corrompa la memoria perteneciente a otras conexiones concurrentes y revele el contenido de b\u00faferes directos agrupados adyacentes al activar operaciones criptogr\u00e1ficas con solicitudes OHTTP manipuladas. La corrupci\u00f3n ocurre independientemente de si la verificaci\u00f3n de la etiqueta AEAD tiene \u00e9xito, ya que BoringSSL pone a cero el b\u00fafer de salida en caso de fallo. La ruta de revelaci\u00f3n de informaci\u00f3n proporciona al atacante la clave de cifrado necesaria para extraer los datos filtrados. Esto viola la confidencialidad y la integridad de todas las conexiones que comparten la misma arena de b\u00fafer de Netty. La versi\u00f3n 0.0.22.Final corrige el problema."}], "id": "CVE-2026-48040", "lastModified": "2026-07-22T20:10:00.127", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "UNREPORTED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48040", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-04T18:01:15.558091Z", "version": "2.0.3"}}]}, "published": "2026-06-04T18:16:31.220", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/netty/netty-incubator-codec-ohttp/commit/7ad38d5cc2827af7e067e5c1e1ac37cd4566dad9"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-32hf-8jw3-v4qq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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