{"id":"CVE-2024-1023","title":"A vulnerability in the Eclipse Vert.x toolkit results in a memory leak due to using Netty FastThreadLocal data structures","summary":"A vulnerability in the Eclipse Vert.x toolkit results in a memory leak due to using Netty FastThreadLocal data structures. Specifically, when the Vert.x HTTP client establishes connections to different hosts, triggering the memory leak. …","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401"],"vendor":"Red Hat","product":"vertx-core","affected":["vertx-core 4.4.5","vertx-core 4.4.6","vertx-core 4.5.0","vertx-core 4.5.1","vert.x","cryostat-tech-preview/cryostat-grafana-dashboard-rhel8 (all versions)","cryostat-tech-preview/cryostat-operator-bundle (all versions)","cryostat-tech-preview/cryostat-reports-rhel8 (all versions)","cryostat-tech-preview/cryostat-rhel8 (all versions)","cryostat-tech-preview/cryostat-rhel8-operator (all versions)","cryostat-tech-preview/jfr-datasource-rhel8 (all versions)","mta/mta-windup-addon-rhel9 (all versions)","vert.x","vert.x","io.vertx/vertx-core (all versions)","vert.x","vert.x","vert.x (all versions)","vert.x","vert.x","vert.x (all versions)","vert.x (all versions)","vert.x (all versions)","vert.x (all versions)","vertx-core","vert.x (all versions)","vert.x","vert.x (all versions)","vert.x (all versions)","vert.x (all versions)","vert.x","vert.x","vert.x","vert.x"],"published":"2024-03-27","updated":"2026-09-23","sourceUpdated":"2026-09-23T04:17:34.030","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-1023","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:1662","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1706","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:2088","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:2833","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3527","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3989","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:4884","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2024-1023","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2260840","label":"secalert@redhat.com"},{"url":"https://github.com/eclipse-vertx/vert.x/issues/5078","label":"secalert@redhat.com"},{"url":"https://github.com/eclipse-vertx/vert.x/pull/5080","label":"secalert@redhat.com"},{"url":"https://github.com/eclipse-vertx/vert.x/pull/5082","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1662","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:1706","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:2088","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:2833","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3527","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3989","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:4884","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/security/cve/CVE-2024-1023","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2260840","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/eclipse-vertx/vert.x/issues/5078","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/eclipse-vertx/vert.x/pull/5080","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/eclipse-vertx/vert.x/pull/5082","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-1023.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-1023"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-1023"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.01653,"epssPercentile":0.75509,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2024-04-03T17:46:25.667630Z"},"ingestedAt":"2026-08-05T10:46:47.638Z","patched":["cryostat_2_on_rhel 8","mta_6_2_for_rhel 8","ceq 3.2","rhint_service_registry_2_5_11_ga","amq_streams 2.7.0","build_of_apache_camel_4_4_1_for_spring_boot 3.2","build_of_quarkus 3.2.11.Final"],"slug":"CVE-2024-1023","body":"## Overview\n\nA vulnerability in the Eclipse Vert.x toolkit results in a memory leak due to using Netty FastThreadLocal data structures. Specifically, when the Vert.x HTTP client establishes connections to different hosts, triggering the memory leak. The leak can be accelerated with intimate runtime knowledge, allowing an attacker to exploit this vulnerability. For instance, a server accepting arbitrary internet addresses could serve as an attack vector by connecting to these addresses, thereby accelerating the memory leak.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2024:2088** · Red Hat · fixed in: Cryostat 2 on RHEL 8 · released 2024-04-29 · [advisory](https://access.redhat.com/errata/RHSA-2024:2088)\n- **RHSA-2024:3989** · Red Hat · fixed in: MTA 6.2 for RHEL 8 · released 2024-06-20 · [advisory](https://access.redhat.com/errata/RHSA-2024:3989)\n- **RHSA-2024:1706** · Red Hat · fixed in: CEQ 3.2 · released 2024-04-09 · [advisory](https://access.redhat.com/errata/RHSA-2024:1706)\n- **RHSA-2024:2833** · Red Hat · fixed in: RHINT Service Registry 2.5.11 GA · released 2024-05-14 · [advisory](https://access.redhat.com/errata/RHSA-2024:2833)\n- **RHSA-2024:3527** · Red Hat · fixed in: Red Hat AMQ Streams 2.7.0 · released 2024-05-30 · [advisory](https://access.redhat.com/errata/RHSA-2024:3527)\n- **RHSA-2024:4884** · Red Hat · fixed in: Red Hat build of Apache Camel 4.4.1 for Spring Boot 3.2 · released 2024-07-25 · [advisory](https://access.redhat.com/errata/RHSA-2024:4884)\n- **RHSA-2024:1662** · Red Hat · fixed in: Red Hat build of Quarkus 3.2.11.Final · released 2024-04-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:1662)\n- **Red Hat VEX** · Moderate · affected: Migration Toolkit for Runtimes, Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Apache Camel for Spring Boot 3, Red Hat Build of Keycloak, Red Hat build of OptaPlanner 8, Red Hat Data Grid 8, … · no fix planned: Red Hat build of Apache Camel for Spring Boot 3, Red Hat build of OptaPlanner 8, Red Hat Integration Camel K 1, Red Hat Integration Camel Quarkus 2, … · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-1023.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.3,"exploitation":12,"ransomware":0},"changes":[{"seq":209458,"id":"CVE-2024-1023","ts":1790137034082,"field":"exploit_available","old":"false","new":"true"}]}