{"id":"CVE-2026-45536","title":"netty-transport-native-epoll: netty-transport-native-kqueue: Netty: Denial of Service due to file descriptor leak in SCM_RIGHTS message han…","summary":"A flaw was found in Netty, a network application framework. A local attacker could exploit a vulnerability in the `netty_unix_socket_recvFd` function when handling `SCM_RIGHTS` messages in `Epoll` or `KQueue DomainSocketChannel` with `Doma…","severity":"medium","cvss":4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"vendor","cwe":["CWE-167","CWE-200","CWE-772"],"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","affected":["cryostat 4","amq_broker 7","amq_clients","build_of_apache_camel_hawtio 4","build_of_apache_camel_4_for_quarkus 3","build_of_apache_camel_for_spring_boot 4","build_of_debezium 3","build_of_keycloak","data_grid 8","fuse 7","jboss_enterprise_application_platform 7","jboss_enterprise_application_platform 8","jboss_enterprise_application_platform_expansion_pack","offline_knowledge_portal","openshift_ai_rhoai","openshift_dev_spaces","single_sign_on 7","streams_for_apache_kafka 2","streams_for_apache_kafka 3","jboss_enterprise_application_platform 8.1"],"patched":["jboss_enterprise_application_platform 8.1"],"published":"2026-06-12","updated":"2026-09-07","sourceUpdated":"2026-09-07T14:27:01+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45536.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45536.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-45536"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2488394"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-45536"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45536"},{"url":"https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"},{"url":"https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"},{"url":"https://github.com/netty/netty/security/advisories/GHSA-w573-9ffj-6ff9"},{"url":"https://access.redhat.com/errata/RHSA-2026:50085"},{"url":"https://github.com/advisories/GHSA-w573-9ffj-6ff9"}],"tags":["csaf","vex","red-hat","ghsa","maven"],"epss":0.00136,"epssPercentile":0.03382,"aliases":["GHSA-w573-9ffj-6ff9"],"ecosystem":"maven","ingestedAt":"2026-07-07T15:41:59.856Z","slug":"CVE-2026-45536","body":"## Overview\n\nA flaw was found in Netty, a network application framework. A local attacker could exploit a vulnerability in the `netty_unix_socket_recvFd` function when handling `SCM_RIGHTS` messages in `Epoll` or `KQueue DomainSocketChannel` with `DomainSocketReadMode.FILE_DESCRIPTORS` enabled. Incorrect handling of file descriptors could lead to a resource leak, resulting in a Denial of Service (DoS) due to exhaustion of available file descriptors.\n\n## Vendor advisories\n\n- **RHSA-2026:50085** · Red Hat · fixed in: Red Hat JBoss Enterprise Application Platform 8.1 · released 2026-08-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:50085)\n- **Red Hat VEX** · Moderate · affected: Cryostat 4, Red Hat AMQ Broker 7, Red Hat AMQ Clients, Red Hat build of Apache Camel - HawtIO 4, Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Apache Camel for Spring Boot 4, … · no fix planned: Cryostat 4, Red Hat AMQ Broker 7, Red Hat AMQ Clients, Red Hat build of Apache Camel - HawtIO 4, … · updated 2026-09-07 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45536.json)\n\n**netty-transport-native-epoll: netty-transport-native-kqueue: Netty: Denial of Service due to file descriptor leak in SCM_RIGHTS message handling** — rated Moderate by Red Hat. Released 2026-06-12, updated 2026-09-07.\n\nAffected:\n\n- Cryostat 4\n- Red Hat AMQ Broker 7\n- Red Hat AMQ Clients\n- Red Hat build of Apache Camel - HawtIO 4\n- Red Hat build of Apache Camel 4 for Quarkus 3\n- Red Hat build of Apache Camel for Spring Boot 4\n- Red Hat build of Debezium 3\n- Red Hat Build of Keycloak\n- Red Hat Data Grid 8\n- Red Hat Fuse 7\n- Red Hat JBoss Enterprise Application Platform 7\n- Red Hat JBoss Enterprise Application Platform 8\n- Red Hat JBoss Enterprise Application Platform Expansion Pack\n- Red Hat Offline Knowledge Portal\n- Red Hat OpenShift AI (RHOAI)\n- Red Hat OpenShift Dev Spaces\n- Red Hat Single Sign-On 7\n- streams for Apache Kafka 2\n- streams for Apache Kafka 3\n\nFixed:\n\n- Red Hat JBoss Enterprise Application Platform 8.1\n\nNo fix planned:\n\n- Cryostat 4\n- Red Hat AMQ Broker 7\n- Red Hat AMQ Clients\n- Red Hat build of Apache Camel - HawtIO 4\n- Red Hat build of Apache Camel 4 for Quarkus 3\n- Red Hat build of Apache Camel for Spring Boot 4\n- Red Hat build of Debezium 3\n- Red Hat Build of Keycloak\n- Red Hat Data Grid 8\n- Red Hat Fuse 7\n- Red Hat JBoss Enterprise Application Platform 7\n- Red Hat JBoss Enterprise Application Platform 8\n- Red Hat JBoss Enterprise Application Platform Expansion Pack\n- Red Hat Offline Knowledge Portal\n- Red Hat OpenShift AI (RHOAI)\n- Red Hat OpenShift Dev Spaces\n- Red Hat Single Sign-On 7\n- streams for Apache Kafka 2\n- streams for Apache Kafka 3\n\nNot affected:\n\n- Red Hat Enterprise Linux AI (RHEL AI) 3\n- Red Hat Satellite 6\n\n## Remediation\n\nBefore applying the update, make sure all previously released errata relevant to your system have been applied. Also, back up your existing installation, including all applications, configuration files, databases and database settings. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:50085\n\nWorkarounds / mitigations:\n\n- To mitigate this issue, ensure that `DomainSocketReadMode.FILE_DESCRIPTORS` is not enabled in applications utilizing Netty's `Epoll` or `KQueue DomainSocketChannel`. This feature is not enabled by default, and disabling it prevents the file descriptor leak that could lead to a Denial of Service.\n\n## Package advisory (CVE-2026-45536)\n\nAffected packages:\n\n- `io.netty:netty-transport-native-epoll >= 4.2.0.Final, <= 4.2.14.Final`\n- `io.netty:netty-transport-native-kqueue >= 4.2.0.Final, <= 4.2.14.Final`\n- `io.netty:netty-transport-native-kqueue <= 4.1.134.Final`\n- `io.netty:netty-transport-native-epoll <= 4.1.134.Final`\n\nPatched in:\n\n- `io.netty:netty-transport-native-epoll 4.2.15.Final`\n- `io.netty:netty-transport-native-kqueue 4.2.15.Final`\n- `io.netty:netty-transport-native-kqueue 4.1.135.Final`\n- `io.netty:netty-transport-native-epoll 4.1.135.Final`\n\nSource: https://github.com/advisories/GHSA-w573-9ffj-6ff9","depth":"sunlit","depthScore":22,"depthScoreParts":{"impact":22,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}