Bug 2477217 (CVE-2026-42579) - CVE-2026-42579 netty: Netty: High integrity impact due to improper DNS domain name constraint enforcement
Summary: CVE-2026-42579 netty: Netty: High integrity impact due to improper DNS domain...
Keywords:
Status: NEW
Alias: CVE-2026-42579
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:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-13 19:01 UTC by OSIDB Bzimport
Modified: 2026-07-09 15:31 UTC (History)
92 users (show)

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

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:28010 0 None None None 2026-06-22 17:15:51 UTC
Red Hat Product Errata RHSA-2026:37390 0 None None None 2026-07-09 15:31:03 UTC

Description OSIDB Bzimport 2026-05-13 19:01:47 UTC 
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Comment 3 errata-xmlrpc 2026-06-22 17:15:46 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 2026-07-09 15:30:57 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
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