CVE-2026-93564

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{"bugzilla": {"description": "io.netty/netty-codec-haproxy: Netty: HAProxy PROXY-v2 nested-TLV grandchild ByteBuf reference-count leak (incomplete fix of PR #16881)", "id": "2536953", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2536953"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1035", "details": ["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."], "mitigation": {"lang": "en:us", "value": "See https://github.com/netty/netty/security/advisories/GHSA-j58c-g352-8h4p for fixed versions and remediation guidance."}, "name": "CVE-2026-93564", "package_state": [{"cpe": "cpe:/a:redhat:amq_broker:7", "fix_state": "Affected", "package_name": "netty-codec-haproxy", "product_name": "Red Hat AMQ Broker 7"}, {"cpe": "cpe:/a:redhat:camel_quarkus:3", "fix_state": "Affected", "package_name": "netty-codec-haproxy", "product_name": "Red Hat build of Apache Camel 4 for Quarkus 3"}, {"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Affected", "package_name": "netty-codec-haproxy", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:apicurio_registry:3", "fix_state": "Affected", "package_name": "netty-codec-haproxy", "product_name": "Red Hat build of Apicurio Registry 3"}, {"cpe": "cpe:/a:redhat:debezium:3", "fix_state": "Affected", "package_name": "netty-codec-haproxy", "product_name": "Red Hat build of Debezium 3"}, {"cpe": "cpe:/a:redhat:build_keycloak:", "fix_state": "Affected", "package_name": "netty-codec-haproxy", "product_name": "Red Hat Build of Keycloak"}, {"cpe": "cpe:/a:redhat:quarkus:3", "fix_state": "Affected", "package_name": "netty-codec-haproxy", "product_name": "Red Hat build of Quarkus"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Fix deferred", "package_name": "netty-codec-haproxy", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Fix deferred", "package_name": "netty-codec-haproxy", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Fix deferred", "package_name": "netty-codec-haproxy", "product_name": "Red Hat Single Sign-On 7"}], "public_date": "2026-09-10T00:46:51Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-93564\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-93564"], "statement": "This vulnerability is rated as Important. It allows a remote, unauthenticated attacker to cause a denial of service by sending specially crafted PROXY-protocol v2 headers to a service utilizing the `netty-codec-haproxy` component. Repeated malformed requests can lead to memory exhaustion due to a reference-count leak in the `HAProxyMessageDecoder`, impacting the availability of affected Red Hat products.", "threat_severity": "Important"}

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