{
  "threat_severity" : "Moderate",
  "public_date" : "2026-06-12T14:16:03Z",
  "bugzilla" : {
    "description" : "netty-resolver-dns: Netty DNS resolver: DNS Cache Poisoning via predictable transaction IDs",
    "id" : "2488386",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2488386"
  },
  "cvss3" : {
    "cvss3_base_score" : "6.8",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-1241",
  "details" : [ "Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, Netty's DNS resolver uses a predictable PRNG for generating DNS transaction IDs and defaults to a static UDP source port. This combination reduces the entropy of DNS queries, enabling DNS Cache Poisoning (Kaminsky attack). Versions 4.1.135.Final and 4.2.15.Final patch the issue.", "A flaw was found in Netty's DNS resolver component. This vulnerability arises from the use of a predictable pseudo-random number generator (PRNG) for DNS transaction IDs and a static User Datagram Protocol (UDP) source port. This combination significantly reduces the randomness of DNS queries, making it easier for a remote attacker to perform DNS Cache Poisoning, also known as a Kaminsky attack. Successful exploitation could allow an attacker to redirect network traffic to malicious servers." ],
  "affected_release" : [ {
    "product_name" : "Red Hat build of Quarkus 3.27.4.SP1",
    "release_date" : "2026-06-17T00:00:00Z",
    "advisory" : "RHSA-2026:26018",
    "cpe" : "cpe:/a:redhat:quarkus:3.27::el8",
    "package" : "netty-resolver-dns"
  }, {
    "product_name" : "Red Hat build of Quarkus 3.33.2.SP1",
    "release_date" : "2026-06-17T00:00:00Z",
    "advisory" : "RHSA-2026:26017",
    "cpe" : "cpe:/a:redhat:quarkus:3.33::el8",
    "package" : "netty-resolver-dns"
  } ],
  "package_state" : [ {
    "product_name" : "Cryostat 4",
    "fix_state" : "Fix deferred",
    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:cryostat:4"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-ekb-dispatcher-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-ekb-receiver-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-eventing-integrations-aws-ddb-streams-source-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-eventing-integrations-aws-s3-sink-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-eventing-integrations-aws-s3-source-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-eventing-integrations-aws-sns-sink-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-eventing-integrations-aws-sqs-sink-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-eventing-integrations-aws-sqs-source-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-eventing-integrations-log-sink-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Fix deferred",
    "package_name" : "openshift-serverless-1/kn-eventing-integrations-timer-source-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "Red Hat build of Apache Camel 4 for Quarkus 3",
    "fix_state" : "Fix deferred",
    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:camel_quarkus:3"
  }, {
    "product_name" : "Red Hat build of Apache Camel for Spring Boot 4",
    "fix_state" : "Fix deferred",
    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:camel_spring_boot:4"
  }, {
    "product_name" : "Red Hat build of Apache Camel - HawtIO 4",
    "fix_state" : "Fix deferred",
    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:apache_camel_hawtio:4"
  }, {
    "product_name" : "Red Hat build of Apicurio Registry 3",
    "fix_state" : "Fix deferred",
    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:apicurio_registry:3"
  }, {
    "product_name" : "Red Hat build of Debezium 3",
    "fix_state" : "Fix deferred",
    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:debezium:3"
  }, {
    "product_name" : "Red Hat Build of Keycloak",
    "fix_state" : "Fix deferred",
    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:build_keycloak:"
  }, {
    "product_name" : "Red Hat Build of Keycloak",
    "fix_state" : "Fix deferred",
    "package_name" : "rhbk/keycloak-rhel9",
    "cpe" : "cpe:/a:redhat:build_keycloak:"
  }, {
    "product_name" : "Red Hat Build of Keycloak",
    "fix_state" : "Fix deferred",
    "package_name" : "rhbk/keycloak-rhel9-operator",
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  }, {
    "product_name" : "Red Hat Build of Keycloak",
    "fix_state" : "Fix deferred",
    "package_name" : "rhbk-openshift-rhel9/rhbk-openshift-rhel9",
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  }, {
    "product_name" : "Red Hat Build of Keycloak",
    "fix_state" : "Fix deferred",
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    "cpe" : "cpe:/a:redhat:build_keycloak:"
  }, {
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    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
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  }, {
    "product_name" : "Red Hat Fuse 7",
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    "package_name" : "netty-resolver-dns",
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    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:jbosseapxp"
  }, {
    "product_name" : "Red Hat OpenShift AI (RHOAI)",
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    "fix_state" : "Fix deferred",
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    "cpe" : "cpe:/a:redhat:openshift_devspaces:3"
  }, {
    "product_name" : "Red Hat OpenShift Dev Spaces",
    "fix_state" : "Fix deferred",
    "package_name" : "devspaces/pluginregistry-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_devspaces:3"
  }, {
    "product_name" : "Red Hat OpenShift Dev Spaces",
    "fix_state" : "Fix deferred",
    "package_name" : "devspaces/server-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_devspaces:3"
  }, {
    "product_name" : "Red Hat Single Sign-On 7",
    "fix_state" : "Fix deferred",
    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:red_hat_single_sign_on:7"
  }, {
    "product_name" : "streams for Apache Kafka 2",
    "fix_state" : "Fix deferred",
    "package_name" : "netty-resolver-dns",
    "cpe" : "cpe:/a:redhat:amq_streams:2"
  }, {
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  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-45673\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45673\nhttps://github.com/netty/netty/releases/tag/netty-4.1.135.Final\nhttps://github.com/netty/netty/releases/tag/netty-4.2.15.Final\nhttps://github.com/netty/netty/security/advisories/GHSA-xmv7-r254-6q78" ],
  "name" : "CVE-2026-45673",
  "mitigation" : {
    "value" : "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
    "lang" : "en:us"
  },
  "csaw" : false
}