Io.netty/netty-codec-haproxy: netty: haproxy proxy-v2 nested-tlv grandchild bytebuf reference-count leak (incomplete fix of pr #16881)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93564
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 15:17:19 UTC
Updated2026-09-22 17:17:30 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.005560000 probability, percentile 0.451720000 (date 2026-09-22)

Problem Types: CWE-1035 | CWE-1035 CWE-1035

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat AMQ Broker 7 Not specified Not specified
CNA Red Hat Red Hat Build Of Apache Camel 4 For Quarkus 3 Not specified Not specified
CNA Red Hat Red Hat Build Of Apache Camel For Spring Boot 4 Not specified Not specified
CNA Red Hat Red Hat Build Of Apicurio Registry 3 Not specified Not specified
CNA Red Hat Red Hat Build Of Debezium 3 Not specified Not specified
CNA Red Hat Red Hat Build Of Keycloak Not specified Not specified
CNA Red Hat Red Hat Fuse 7 Not specified Not specified
CNA Red Hat Red Hat JBoss Enterprise Application Platform 7 Not specified Not specified
CNA Red Hat Red Hat Single Sign-On 7 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2026:69470 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:70257 [email protected] access.redhat.com
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
access.redhat.com/errata/RHSA-2026:69440 [email protected] access.redhat.com
access.redhat.com/security/cve/CVE-2026-93564 [email protected] access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2026-09-10T00:46:51.000ZReported to Red Hat.
CNA2026-09-10T00:46:51.000ZMade public.

Workarounds

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

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