Bug 2488383 (CVE-2026-44893) - CVE-2026-44893 netty-codec-haproxy: Netty-codec-haproxy: Denial of Service via malformed HAProxy message
Summary: CVE-2026-44893 netty-codec-haproxy: Netty-codec-haproxy: Denial of Service vi...
Keywords:
Status: NEW
Alias: CVE-2026-44893
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-12 15:01 UTC by OSIDB Bzimport
Modified: 2026-08-11 17:42 UTC (History)
103 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:26586 0 None None None 2026-06-17 23:05:36 UTC
Red Hat Product Errata RHSA-2026:34608 0 None None None 2026-07-02 00:04:31 UTC
Red Hat Product Errata RHSA-2026:37390 0 None None None 2026-07-09 15:30:12 UTC
Red Hat Product Errata RHSA-2026:41951 0 None None None 2026-07-20 11:58:07 UTC
Red Hat Product Errata RHSA-2026:48151 0 None None None 2026-07-29 19:55:00 UTC
Red Hat Product Errata RHSA-2026:50085 0 None None None 2026-08-04 14:00:02 UTC
Red Hat Product Errata RHSA-2026:53644 0 None None None 2026-08-11 16:37:59 UTC
Red Hat Product Errata RHSA-2026:53806 0 None None None 2026-08-11 17:42:49 UTC

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
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