Bug 2505911 (CVE-2026-56745) - CVE-2026-56745 netty: io.netty/netty-codec-http: Netty: Denial of Service via memory exhaustion in SPDY-to-HTTP codec
Summary: CVE-2026-56745 netty: io.netty/netty-codec-http: Netty: Denial of Service via...
Keywords:
Status: NEW
Alias: CVE-2026-56745
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-21 22:53 UTC by OSIDB Bzimport
Modified: 2026-07-30 07:45 UTC (History)
109 users (show)

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:48118 0 None None None 2026-07-30 07:45:40 UTC

Description OSIDB Bzimport 2026-07-21 22:53:10 UTC 
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the `SpdyHttpDecoder` handler in Netty's SPDY-to-HTTP codec allocates a pooled `ByteBuf` when processing a client-initiated `SYN_STREAM` frame with `FLAG_FIN=0` and stores the partially constructed `FullHttpRequest` in `messageMap`; when the remote peer sends `RST_STREAM` for that stream or the accumulated content exceeds `maxContentLength`, the decoder removes the entry but does not release the pooled `ByteBuf`, causing native memory exhaustion. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Comment 1 errata-xmlrpc 2026-07-30 07:45:32 UTC 
This issue has been addressed in the following products:

  Red Hat Build of Apache Camel 4.18 for Quarkus 3.33

Via RHSA-2026:48118 https://access.redhat.com/errata/RHSA-2026:48118
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