Bug 2488441 (CVE-2026-48748)

Summary: CVE-2026-48748 netty: Netty: Denial of Service due to memory exhaustion in HTTP/3 codec
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: abrianik, ggrzybek, jraez, parichar, tasato
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Netty. A remote attacker can exploit a memory exhaustion vulnerability in the Netty HTTP/3 codec by creating an infinite number of blocked streams. This can lead to an Out Of Memory (OOM) error, resulting in a Denial of Service (DoS) for the affected system.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-06-12 16:03:16 UTC
Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, a memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error. Version 4.2.15.Final patches the issue.