Bug 2524626 (CVE-2026-47843)

Summary: CVE-2026-47843 io.projectreactor.netty/reactor-netty: Reactor Netty: Incorrect traffic routing due to DNS resolver reuse
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: gmalinko, janstey, pdelbell, rstepani
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Reactor Netty. In specific scenarios, when multiple clients use different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver. This can lead to traffic being routed incorrectly, potentially impacting the intended destination of network communications.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-26 19:31:23 UTC 
In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver.
Reactor Netty 1.3.0 - 1.3.6
Reactor Netty 1.1.0 - 1.2.18
Reactor Netty 1.0.52 and earlier