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Review reviewHigh

CVE-2026-46340

netty netty, Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16, Red Hat Data Grid 8.6.2

Netty is a network application framework for development of protocol servers and clients. In versions of netty-transport-sctp prior to 4.1.135.Final and 4.2.15.Final, for each non-complete SctpMessage fragment the handler does `fragments.put(streamId, Unpooled.wrappedBuffer(frag, byteBuf))`, wrapping the previous accumulator and the new slice into a *new* CompositeByteBuf every time. After N fragments the accumulator is an N-deep chain of composites, each holding references and component arrays; readableBytes()/getBytes() on the final buffer recurse N levels. There is no limit on N, on tota...

CVSS
7.5
EPSS
0.39%
31.7% percentile
CISA KEV
Not listed
Published
2026.06.13
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.39%
Technical severityCVSS 7.5

Vulnerability overview

Netty is a network application framework for development of protocol servers and clients. In versions of netty-transport-sctp prior to 4.1.135.Final and 4.2.15.Final, for each non-complete SctpMessage fragment the handler does `fragments.put(streamId, Unpooled.wrappedBuffer(frag, byteBuf))`, wrapping the previous accumulator and the new slice into a *new* CompositeByteBuf every time. After N fragments the accumulator is an N-deep chain of composites, each holding references and component arrays; readableBytes()/getBytes() on the final buffer recurse N levels. There is no limit on N, on tota...

Affected product and versions

Product
netty netty, Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16, Red Hat Data Grid 8.6.2
Affected versions
>= >= 4.2.0.Final, < 4.2.15.Final, >= < 4.1.135.Final, < 4.1.135, >= 4.2.0 < 4.2.15
Fixed versions
4.1.135, 4.2.15

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that netty netty, Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16, Red Hat Data Grid 8.6.2 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-770