{"id":"CVE-2026-93564","state":"PUBLISHED","title":"Io.netty/netty-codec-haproxy: netty: haproxy proxy-v2 nested-tlv grandchild bytebuf reference-count leak (incomplete fix of pr #16881)","description":"A flaw was found in Netty. A reference-count leak in the HAProxy PROXY-v2 message decoder allows a remote, unauthenticated attacker to send specially crafted PROXY-protocol v2 headers. This can lead to memory exhaustion, resulting in a Denial of Service (DoS) for the affected system.","publishedAt":"2026-09-18T14:13:32.128Z","updatedAt":"2026-10-15T16:42:37.896Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"redhat"},"assigner":"redhat","products":["Red Hat Red Hat Build of Apache Camel 3.33.3.SP2","Red Hat Red Hat Build of Debezium 3.6","Red Hat Red Hat build of Quarkus 3.27.5.SP2","Red Hat Red Hat build of Quarkus 3.33.3.SP2","Red Hat Red Hat AMQ Broker 7","Red Hat Red Hat build of Apache Camel 4 for Quarkus 3","Red Hat Red Hat build of Apache Camel for Spring Boot 4","Red Hat Red Hat build of Apicurio Registry 3","Red Hat Red Hat Build of Keycloak","Red Hat Red Hat Fuse 7","Red Hat Red Hat JBoss Enterprise Application Platform 7","Red Hat Red Hat Single Sign-On 7"],"affected":[{"vendor":"Red Hat","product":"Red Hat Build of Apache Camel 3.33.3.SP2","packageName":"io.netty/netty-codec-haproxy","defaultStatus":"affected","versions":[{"version":"4.1.138.Final-redhat-00001","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:apache_camel_quarkus:3.33"]},{"vendor":"Red Hat","product":"Red Hat Build of Debezium 3.6","packageName":"netty-codec-haproxy","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:debezium:3.6"]},{"vendor":"Red Hat","product":"Red Hat build of Quarkus 3.27.5.SP2","packageName":"netty-codec-haproxy","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:quarkus:3.27::el8"]},{"vendor":"Red Hat","product":"Red Hat build of Quarkus 3.33.3.SP2","packageName":"netty-codec-haproxy","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:quarkus:3.33::el8"]},{"vendor":"Red Hat","product":"Red Hat AMQ Broker 7","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:amq_broker:7"]},{"vendor":"Red Hat","product":"Red Hat build of Apache Camel 4 for Quarkus 3","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:camel_quarkus:3"]},{"vendor":"Red Hat","product":"Red Hat build of Apache Camel for Spring Boot 4","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:camel_spring_boot:4"]},{"vendor":"Red Hat","product":"Red Hat build of Apicurio Registry 3","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:apicurio_registry:3"]},{"vendor":"Red Hat","product":"Red Hat Build of Keycloak","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:"]},{"vendor":"Red Hat","product":"Red Hat Fuse 7","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:jboss_fuse:7"]},{"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 7","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"]},{"vendor":"Red Hat","product":"Red Hat Single Sign-On 7","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:red_hat_single_sign_on:7"]}],"references":["https://access.redhat.com/errata/RHSA-2026:69440","https://access.redhat.com/errata/RHSA-2026:69470","https://access.redhat.com/errata/RHSA-2026:70257","https://access.redhat.com/errata/RHSA-2026:83612","https://access.redhat.com/security/cve/CVE-2026-93564","https://bugzilla.redhat.com/show_bug.cgi?id=2536953"],"weaknesses":["CWE-1035"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93564.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93564","state":"PUBLISHED","datePublished":"2026-09-18T14:13:32.128Z","dateUpdated":"2026-10-15T16:42:37.896Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2026-09-18T09:58:47.232Z"},"containers":{"cna":{"title":"Io.netty/netty-codec-haproxy: netty: haproxy proxy-v2 nested-tlv grandchild bytebuf reference-count leak (incomplete fix of pr #16881)","descriptions":[{"lang":"en","value":"A flaw was found in Netty. A reference-count leak in the HAProxy PROXY-v2 message decoder allows a remote, unauthenticated attacker to send specially crafted PROXY-protocol v2 headers. This can lead to memory exhaustion, resulting in a Denial of Service (DoS) for the affected system."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Build of Apache Camel 3.33.3.SP2","packageName":"io.netty/netty-codec-haproxy","defaultStatus":"affected","versions":[{"version":"4.1.138.Final-redhat-00001","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:apache_camel_quarkus:3.33"]},{"vendor":"Red Hat","product":"Red Hat Build of Debezium 3.6","packageName":"netty-codec-haproxy","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:debezium:3.6"]},{"vendor":"Red Hat","product":"Red Hat build of Quarkus 3.27.5.SP2","packageName":"netty-codec-haproxy","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:quarkus:3.27::el8"]},{"vendor":"Red Hat","product":"Red Hat build of Quarkus 3.33.3.SP2","packageName":"netty-codec-haproxy","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:quarkus:3.33::el8"]},{"vendor":"Red Hat","product":"Red Hat AMQ Broker 7","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:amq_broker:7"]},{"vendor":"Red Hat","product":"Red Hat build of Apache Camel 4 for Quarkus 3","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:camel_quarkus:3"]},{"vendor":"Red Hat","product":"Red Hat build of Apache Camel for Spring Boot 4","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:camel_spring_boot:4"]},{"vendor":"Red Hat","product":"Red Hat build of Apicurio Registry 3","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:apicurio_registry:3"]},{"vendor":"Red Hat","product":"Red Hat Build of Keycloak","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:"]},{"vendor":"Red Hat","product":"Red Hat Fuse 7","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:jboss_fuse:7"]},{"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 7","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"]},{"vendor":"Red Hat","product":"Red Hat Single Sign-On 7","packageName":"netty-codec-haproxy","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:red_hat_single_sign_on:7"]}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:69440","name":"RHSA-2026:69440","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:69470","name":"RHSA-2026:69470","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:70257","name":"RHSA-2026:70257","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:83612","name":"RHSA-2026:83612","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-93564","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536953","name":"RHBZ#2536953","tags":["issue-tracking","x_refsource_REDHAT"]}],"metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1035","description":"CWE-1035","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateUpdated":"2026-10-15T16:42:37.896Z"},"datePublic":"2026-09-10T00:46:51.000Z","x_redhatCweChain":"CWE-1035","workarounds":[{"lang":"en","value":"See https://github.com/netty/netty/security/advisories/GHSA-j58c-g352-8h4p for fixed versions and remediation guidance."}],"timeline":[{"lang":"en","time":"2026-09-10T00:46:51.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-09-10T00:46:51.000Z","value":"Made public."}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-18T17:42:29.142695Z","id":"CVE-2026-93564","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-18T17:42:41.325Z"}}]}}}