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In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue."}],"source":{"advisory":"GHSA-3qp7-7mw8-wx86","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-12T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-44249"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-13T03:55:45.263Z"}},{"affected":[{"cpes":["cpe:/a:redhat:apache_camel_quarkus:3.33"],"defaultStatus":"affected","product":"Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:offline_knowledge_portal:1.2::el9"],"defaultStatus":"affected","product":"Red Hat Offline Knowledge Portal 1.2.7","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:openshift_devspaces:3.29::el9"],"defaultStatus":"affected","product":"Red Hat OpenShift Dev Spaces 3.29","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:quarkus:3.27::el8"],"defaultStatus":"affected","product":"Red Hat build of Quarkus 3.27.4.SP1","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:quarkus:3.33::el8"],"defaultStatus":"affected","product":"Red Hat build of Quarkus 3.33.2.SP1","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:amq_streams:2.9::el9"],"defaultStatus":"affected","product":"Streams for Apache Kafka 2.9.4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:cryostat:4"],"defaultStatus":"affected","product":"Cryostat 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:serverless:1"],"defaultStatus":"affected","product":"OpenShift Serverless","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:amq_broker:7"],"defaultStatus":"affected","product":"Red Hat AMQ Broker 7","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:amq_clients:2023"],"defaultStatus":"affected","product":"Red Hat AMQ Clients","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:apache_camel_hawtio:4"],"defaultStatus":"affected","product":"Red Hat build of Apache Camel - HawtIO 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:camel_quarkus:3"],"defaultStatus":"affected","product":"Red Hat build of Apache Camel 4 for Quarkus 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:camel_spring_boot:4"],"defaultStatus":"affected","product":"Red Hat build of Apache Camel for Spring Boot 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:apicurio_registry:3"],"defaultStatus":"affected","product":"Red Hat build of Apicurio Registry 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:debezium:3"],"defaultStatus":"affected","product":"Red Hat build of Debezium 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:build_keycloak:"],"defaultStatus":"affected","product":"Red Hat Build of Keycloak","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_data_grid:8"],"defaultStatus":"affected","product":"Red Hat Data Grid 8","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:enterprise_linux_ai:3"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AI (RHEL AI) 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_fuse:7"],"defaultStatus":"affected","product":"Red Hat Fuse 7","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"],"defaultStatus":"affected","product":"Red Hat JBoss Enterprise Application Platform 7","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"affected","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jbosseapxp"],"defaultStatus":"affected","product":"Red Hat JBoss Enterprise Application Platform Expansion Pack","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:openshift_devspaces:3"],"defaultStatus":"affected","product":"Red Hat OpenShift Dev Spaces","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:amq_streams:3"],"defaultStatus":"affected","product":"streams for Apache Kafka 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:satellite:6"],"defaultStatus":"unaffected","product":"Red Hat Satellite 6","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:red_hat_single_sign_on:7"],"defaultStatus":"unaffected","product":"Red Hat Single Sign-On 7","vendor":"Red Hat"}],"datePublic":"2026-06-11T20:46:14.110Z","descriptions":[{"lang":"en","value":"A flaw was found in netty-handler, a component of the Netty network application framework. A remote attacker can exploit an incorrect masking operation in the IpSubnetFilterRule.compareTo() function to bypass configured IPv6 subnet rules. This allows valid public IP addresses to circumvent intended network restrictions, potentially leading to unauthorized access or exposure of services."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1287","description":"Improper Validation of Specified Type of Input","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-44249"},{"name":"RHBZ#2488081","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2488081"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44249.json"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26586"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:28573"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:36820"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26018"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26017"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:34608"}],"solutions":[{"lang":"en","value":"RHSA-2026:26586: Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1"},{"lang":"en","value":"RHSA-2026:28573: Red Hat Offline Knowledge Portal 1.2.7"},{"lang":"en","value":"RHSA-2026:36820: Red Hat OpenShift Dev Spaces 3.29"},{"lang":"en","value":"RHSA-2026:26018: Red Hat build of Quarkus 3.27.4.SP1"},{"lang":"en","value":"RHSA-2026:26017: Red Hat build of Quarkus 3.33.2.SP1"},{"lang":"en","value":"RHSA-2026:34608: Streams for Apache Kafka 2.9.4"}],"timeline":[{"lang":"en","time":"2026-06-11T22:02:05.327Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-06-11T20:46:14.110Z","value":"Made public."}],"title":"netty-handler: netty-handler: IPv6 subnet rule bypass due to incorrect masking operation","workarounds":[{"lang":"en","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."}],"x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"},"providerMetadata":{"orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP","dateUpdated":"2026-07-09T12:09:57.944Z"}}]}}