Bug 2488386 (CVE-2026-45673) - CVE-2026-45673 netty-resolver-dns: Netty DNS resolver: DNS Cache Poisoning via predictable transaction IDs
Summary: CVE-2026-45673 netty-resolver-dns: Netty DNS resolver: DNS Cache Poisoning vi...
Keywords:
Status: NEW
Alias: CVE-2026-45673
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
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: 2026-08-04 14:00 UTC (History)
91 users (show)

Fixed In Version:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:50085 0 None None None 2026-08-04 14:00:12 UTC

Description OSIDB Bzimport 2026-06-12 15:01:51 UTC 
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, Netty's DNS resolver uses a predictable PRNG for generating DNS transaction IDs and defaults to a static UDP source port. This combination reduces the entropy of DNS queries, enabling DNS Cache Poisoning (Kaminsky attack). Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Comment 1 errata-xmlrpc 2026-08-04 14:00:07 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
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