Bug 2477220 (CVE-2026-42587) - CVE-2026-42587 netty: io.netty/netty-codec-http: io.netty/netty-codec-http2: Netty: Denial of Service via unbounded memory allocation in HTTP content decompression
Summary: CVE-2026-42587 netty: io.netty/netty-codec-http: io.netty/netty-codec-http2: ...
Keywords:
Status: NEW
Alias: CVE-2026-42587
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2482687
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-13 19:01 UTC by OSIDB Bzimport
Modified: 2026-09-21 14:39 UTC (History)
110 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-2026:28010 0 None None None 2026-06-22 17:15:53 UTC
Red Hat Product Errata RHSA-2026:34608 0 None None None 2026-07-02 00:04:45 UTC
Red Hat Product Errata RHSA-2026:37390 0 None None None 2026-07-09 15:31:10 UTC
Red Hat Product Errata RHSA-2026:41951 0 None None None 2026-07-20 11:59:40 UTC
Red Hat Product Errata RHSA-2026:50085 0 None None None 2026-08-04 13:59:38 UTC
Red Hat Product Errata RHSA-2026:53644 0 None None None 2026-08-11 16:37:00 UTC
Red Hat Product Errata RHSA-2026:53645 0 None None None 2026-09-17 17:48:46 UTC
Red Hat Product Errata RHSA-2026:53646 0 None None None 2026-09-17 17:47:01 UTC
Red Hat Product Errata RHSA-2026:53806 0 None None None 2026-08-11 17:41:55 UTC
Red Hat Product Errata RHSA-2026:66488 0 None None None 2026-09-10 16:34:55 UTC
Red Hat Product Errata RHSA-2026:66545 0 None None None 2026-09-10 23:23:04 UTC
Red Hat Product Errata RHSA-2026:69459 0 None None None 2026-09-21 14:39:38 UTC

Description OSIDB Bzimport 2026-05-13 19:01:58 UTC 
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpContentDecompressor accepts a maxAllocation parameter to limit decompression buffer size and prevent decompression bomb attacks. This limit is correctly enforced for gzip and deflate encodings via ZlibDecoder, but is silently ignored when the content encoding is br (Brotli), zstd, or snappy. An attacker can bypass the configured decompression limit by sending a compressed payload with Content-Encoding: br instead of Content-Encoding: gzip, causing unbounded memory allocation and out-of-memory denial of service. The same vulnerability exists in DelegatingDecompressorFrameListener for HTTP/2 connections. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Comment 3 errata-xmlrpc 2026-06-22 17:15:48 UTC 
This issue has been addressed in the following products:

  Cryostat 4 on RHEL 9

Via RHSA-2026:28010 https://access.redhat.com/errata/RHSA-2026:28010
Comment 4 errata-xmlrpc 2026-07-02 00:04:37 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 5 errata-xmlrpc 2026-07-09 15:31:04 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 6 errata-xmlrpc 2026-07-20 11:59:34 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 9 errata-xmlrpc 2026-08-04 13:59:32 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 12 errata-xmlrpc 2026-08-11 16:36:53 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 13 errata-xmlrpc 2026-08-11 17:41:49 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 15 errata-xmlrpc 2026-09-10 16:34:49 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
Comment 16 errata-xmlrpc 2026-09-10 23:22:58 UTC 
This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.13.6

Via RHSA-2026:66545 https://access.redhat.com/errata/RHSA-2026:66545
Comment 17 Jon Orris 2026-09-17 17:46:55 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9

Via RHSA-2026:53646 https://access.redhat.com/errata/RHSA-2026:53646
Comment 18 Jon Orris 2026-09-17 17:48:41 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8

Via RHSA-2026:53645 https://access.redhat.com/errata/RHSA-2026:53645
Comment 19 Jon Orris 2026-09-21 14:39:31 UTC 
This issue has been addressed in the following products:

  AMQ Clients 2026.Q3

Via RHSA-2026:69459 https://access.redhat.com/errata/RHSA-2026:69459
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