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.
Published: 2026-09-18
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

See https://github.com/netty/netty/security/advisories/GHSA-j58c-g352-8h4p for fixed versions and remediation guidance.

Tracking

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Advisories

No advisories yet.

History

Mon, 21 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat amq Broker 7
Redhat build Of Apache Camel For Quarkus
Redhat build Of Apache Camel For Spring Boot
Redhat build Of Apicurio Registry
Redhat build Of Debezium 3
Redhat build Of Keycloak
Redhat build Of Quarkus
Redhat quay 3
Redhat single Sign-on
Vendors & Products Redhat amq Broker 7
Redhat build Of Apache Camel For Quarkus
Redhat build Of Apache Camel For Spring Boot
Redhat build Of Apicurio Registry
Redhat build Of Debezium 3
Redhat build Of Keycloak
Redhat build Of Quarkus
Redhat quay 3
Redhat single Sign-on

Mon, 21 Sep 2026 17:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:quarkus:3
Vendors & Products Redhat quarkus
References

Sat, 19 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Description HAProxy PROXY-v2 nested-TLV grandchild ByteBuf reference-count leak (incomplete fix of PR #16881) 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.
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Description HAProxy PROXY-v2 nested-TLV grandchild ByteBuf reference-count leak (incomplete fix of PR #16881)
Title Io.netty/netty-codec-haproxy: netty: haproxy proxy-v2 nested-tlv grandchild bytebuf reference-count leak (incomplete fix of pr #16881)
First Time appeared Redhat
Redhat amq Broker
Redhat apicurio Registry
Redhat build Keycloak
Redhat camel Quarkus
Redhat camel Spring Boot
Redhat debezium
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat quarkus
Redhat red Hat Single Sign On
Weaknesses CWE-1035
CPEs cpe:/a:redhat:amq_broker:7
cpe:/a:redhat:apicurio_registry:3
cpe:/a:redhat:build_keycloak:
cpe:/a:redhat:camel_quarkus:3
cpe:/a:redhat:camel_spring_boot:4
cpe:/a:redhat:debezium:3
cpe:/a:redhat:jboss_enterprise_application_platform:7
cpe:/a:redhat:jboss_fuse:7
cpe:/a:redhat:quarkus:3
cpe:/a:redhat:red_hat_single_sign_on:7
Vendors & Products Redhat
Redhat amq Broker
Redhat apicurio Registry
Redhat build Keycloak
Redhat camel Quarkus
Redhat camel Spring Boot
Redhat debezium
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat quarkus
Redhat red Hat Single Sign On
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Redhat Amq Broker Amq Broker 7 Apicurio Registry Build Keycloak Build Of Apache Camel For Quarkus Build Of Apache Camel For Spring Boot Build Of Apicurio Registry Build Of Debezium 3 Build Of Keycloak Build Of Quarkus Camel Quarkus Camel Spring Boot Debezium Jboss Enterprise Application Platform Jboss Fuse Quay 3 Red Hat Single Sign On Single Sign-on
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-21T16:37:22.473Z

Reserved: 2026-09-18T09:58:47.232Z

Link: CVE-2026-93564

cve-icon Vulnrichment

Updated: 2026-09-18T17:42:35.811Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T15:17:19.943

Modified: 2026-09-21T17:19:17.460

Link: CVE-2026-93564

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-10T00:46:51Z

Links: CVE-2026-93564 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T19:25:37Z

Weaknesses