Bug 2488383 (CVE-2026-44893)

Summary:	CVE-2026-44893 netty-codec-haproxy: Netty-codec-haproxy: Denial of Service via malformed HAProxy message
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	aazores, abrianik, anthomas, ant, anujha, aschwart, asoldano, aszczucz, ataylor, avibelli, bbaranow, bgeorges, bmaxwell, boliveir, bstansbe, ccranfor, cescoffi, chfoley, cmah, dandread, dbruscin, dhanak, dkreling, dlofthou, drichtar, drosa, dsimansk, eaguilar, ebaron, ehelms, ehugonne, ewittman, fmariani, fmongiar, ggainey, ggrzybek, gmalinko, gsmet, gtanzill, istudens, ivassile, iweiss, janstey, jbuscemi, jkoehler, jmartisk, jnethert, jolong, jpasqual, jpechane, jraez, juwatts, jwon, kaycoth, kingland, kvanderr, lphiri, lthon, manderse, mcarlett, mhulan, mnovotny, mosmerov, mposolda, msvehla, nipatil, nmoumoul, nwallace, olubyans, osousa, pantinor, parichar, pberan, pcreech, pesilva, pgallagh, pjindal, pmackay, probinso, rchan, rgodfrey, rguimara, rkubis, rmartinc, rruss, rstancel, rstepani, rsvoboda, sausingh, sbiarozk, sdawley, smallamp, ssilvert, sthorger, swoodman, tasato, tcunning, thjenkin, tmalecek, tqvarnst, vdosoudi, vmuzikar, yfang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in netty-codec-haproxy, a component of the Netty network application framework. A remote attacker can exploit this vulnerability by sending a specially crafted HAProxy message with a malformed PP2_TYPE_SSL TLV (Type-Length-Value) header. This can lead to an IndexOutOfBoundsException and prevent the release of retained memory, ultimately causing a Denial of Service (DoS) condition for the affected application.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-06-12 15:01:40 UTC

Netty is a network application framework for development of protocol servers and clients. In netty-codec-haproxy prior to versions 4.1.135.Final and 4.2.15.Final, when decoding a PP2_TYPE_SSL TLV, HAProxyMessage.readNextTLV() first calls `header.retainedSlice(header.readerIndex(), length)` and only then reads the 1-byte client field and 4-byte verify field. If the attacker sets the TLV length below 5, the subsequent readByte/readInt throws IndexOutOfBoundsException. HAProxyMessageDecoder only catches HAProxyProtocolException around this call, so the IOOBE propagates and the retained slice on the pooled cumulation buffer is never released. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Comment 1 errata-xmlrpc 2026-06-17 23:05:35 UTC

This issue has been addressed in the following products:

  Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1

Via RHSA-2026:26586 https://access.redhat.com/errata/RHSA-2026:26586

Comment 2 errata-xmlrpc 2026-07-02 00:04:30 UTC

This issue has been addressed in the following products:

  Streams for Apache Kafka 2.9.4

Via RHSA-2026:34608 https://access.redhat.com/errata/RHSA-2026:34608

Comment 3 errata-xmlrpc 2026-07-09 15:30:06 UTC

This issue has been addressed in the following products:

  Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16

Via RHSA-2026:37390 https://access.redhat.com/errata/RHSA-2026:37390

Comment 4 errata-xmlrpc 2026-07-20 11:58:02 UTC

This issue has been addressed in the following products:

  Red Hat Data Grid 8.6.2

Via RHSA-2026:41951 https://access.redhat.com/errata/RHSA-2026:41951

Comment 5 errata-xmlrpc 2026-07-29 19:54:54 UTC

This issue has been addressed in the following products:

  Cryostat 4 on RHEL 9

Via RHSA-2026:48151 https://access.redhat.com/errata/RHSA-2026:48151

Comment 6 errata-xmlrpc 2026-08-04 13:59:56 UTC

This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 8.1

Via RHSA-2026:50085 https://access.redhat.com/errata/RHSA-2026:50085

Comment 8 errata-xmlrpc 2026-08-11 16:37:53 UTC

This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7

Via RHSA-2026:53644 https://access.redhat.com/errata/RHSA-2026:53644

Comment 9 errata-xmlrpc 2026-08-11 17:42:43 UTC

This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.4.25

Via RHSA-2026:53806 https://access.redhat.com/errata/RHSA-2026:53806

Comment 10 errata-xmlrpc 2026-09-10 16:36:01 UTC

This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.14.1

Via RHSA-2026:66488 https://access.redhat.com/errata/RHSA-2026:66488