Bug 2488081 (CVE-2026-44249) - CVE-2026-44249 netty-handler: netty-handler: IPv6 subnet rule bypass due to incorrect masking operation
Summary: CVE-2026-44249 netty-handler: netty-handler: IPv6 subnet rule bypass due to i...
Keywords:
Status: NEW
Alias: CVE-2026-44249
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: 2026-06-11 22:02 UTC by OSIDB Bzimport
Modified: 2026-06-23 08:54 UTC (History)
105 users (show)

Fixed In Version:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:26586 0 None None None 2026-06-17 23:05:41 UTC

Description OSIDB Bzimport 2026-06-11 22:02:27 UTC 
Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Comment 2 errata-xmlrpc 2026-06-17 23:05:34 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
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