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{"bugzilla": {"description": "io.netty/netty-codec-http2: Netty: Denial of Service via HTTP/2 DATA frame memory leak", "id": "2505980", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2505980"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in Netty, a network application framework. A remote, unauthenticated attacker can exploit this vulnerability by sending specially crafted HTTP/2 DATA frames to applications that use Netty and have HTTP/2 content decompression enabled. This can lead to memory exhaustion, causing the application to crash and resulting in a Denial of Service (DoS). The issue occurs because the framework fails to release retained memory buffers when processing DATA frames for a stream whose decompressor has already been closed."], "name": "CVE-2026-56819", "package_state": [{"cpe": "cpe:/a:redhat:cryostat:4", "fix_state": "Affected", "impact": "important", "package_name": "netty-codec-http2", "product_name": "Cryostat 4"}, {"cpe": "cpe:/a:redhat:serverless:1", "fix_state": "Affected", "impact": "important", "package_name": "openshift-serverless-1/kn-ekb-dispatcher-rhel9", "product_name": "OpenShift Serverless"}, {"cpe": "cpe:/a:redhat:serverless:1", "fix_state": "Affected", "impact": "important", "package_name": "openshift-serverless-1/kn-ekb-receiver-rhel9", "product_name": "OpenShift Serverless"}, {"cpe": "cpe:/a:redhat:serverless:1", "fix_state": "Affected", "impact": "important", "package_name": "openshift-serverless-1/kn-eventing-integrations-aws-ddb-streams-source-rhel9", "product_name": "OpenShift Serverless"}, {"cpe": 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"fix_state": "Affected", "impact": "important", "package_name": "bazel6", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "impact": "important", "package_name": "bazel7", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "impact": "important", "package_name": "bazel8", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "impact": "important", "package_name": "eap74-els-openjdk11-openshift-rhel8/eap74-els-openjdk11-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "impact": "important", "package_name": "eap74-els-openjdk17-openshift-rhel8/eap74-els-openjdk17-openshift-rhel8", "product_name": "Red 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"product_name": "Red Hat Single Sign-On 7"}, {"cpe": "cpe:/a:redhat:amq_streams:2", "fix_state": "Affected", "impact": "important", "package_name": "netty-codec-http2", "product_name": "streams for Apache Kafka 2"}, {"cpe": "cpe:/a:redhat:amq_streams:3", "fix_state": "Affected", "impact": "important", "package_name": "netty-codec-http2", "product_name": "streams for Apache Kafka 3"}], "public_date": "2026-07-21T22:11:17Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56819\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56819\nhttps://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003bhttps://github.com/netty/netty/releases/tag/netty-4.2.16.Final\nhttps://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6\nhttps://github.com/netty/netty/releases/tag/netty-4.1.136.Final\nhttps://github.com/netty/netty/releases/tag/netty-4.2.16.Final\nhttps://github.com/netty/netty/security/advisories/GHSA-93wv-jw9v-4972"], "threat_severity": "Important"}

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