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TI-2026-42716 Aliases CVE-2026-59902GHSA-2qj4-mmr9-4v2f

Netty: Memory Exhaustion in SctpMessageCompletionHandler

Priority LOW 39CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.

Summary

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.sctp.SctpMessageCompletionHandler limits incomplete messages and fragment counts but not maxBufferedBytes, allowing unauthenticated peers to exhaust memory with large SCTP fragments. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00365 30th percentileScored 2026-11-07
Fix Partial netty (netty): 4.1.137.Final, 4.2.17.Finalio.netty:netty-transport-sctp (Maven): 4.2.17.Final, 4.1.137.FinalRed Hat: 1 advisoryRed Hat: 1 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nettynettybefore 4.1.137.Final; 4.2.0.Final to before 4.2.17.Final4.1.137.Final, 4.2.17.FinalPatch availableCNA
—io.netty:netty-transport-sctp (Maven)4.2.0.Final to before 4.2.17.Final4.2.17.FinalPatch availableGHSA-2qj4-mmr9-4v2f
—io.netty:netty-transport-sctp (Maven)before 4.1.137.Final4.1.137.FinalPatch availableGHSA-2qj4-mmr9-4v2f
  • netty Vendornetty Affected before 4.1.137.Final; 4.2.0.Final to before 4.2.17.Final Fixed in 4.1.137.Final, 4.2.17.Final Patch available CNA
  • io.netty:netty-transport-sctp (Maven) Vendor— Affected 4.2.0.Final to before 4.2.17.Final Fixed in 4.2.17.Final Patch available GHSA-2qj4-mmr9-4v2f
  • io.netty:netty-transport-sctp (Maven) Vendor— Affected before 4.1.137.Final Fixed in 4.1.137.Final Patch available GHSA-2qj4-mmr9-4v2f

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*before 4.1.137; 4.2.0 to before 4.2.17Vulnerablenetty
  • cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:* Versions before 4.1.137; 4.2.0 to before 4.2.17 Vulnerable ·netty

Remediation

  • Fix · CNA netty (netty) Fixed in 4.1.137.Final, 4.2.17.Final
  • Fix · GHSA-2qj4-mmr9-4v2f io.netty:netty-transport-sctp (Maven) Fixed in 4.2.17.Final Advisory →
  • Fix · GHSA-2qj4-mmr9-4v2f io.netty:netty-transport-sctp (Maven) Fixed in 4.1.137.Final Advisory →

Red Hat 1 advisory

  • RHSA-2026:71675 Released 2026-09-24 · Red Hat rating Important
    Red Hat Build of Apache Camel 4.18.4 for Spring Boot release.
    • Red Hat build of Apache Camel 4.18.4 for Spring Boot 3.5.16

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet
Red Hat JBoss Enterprise Application Platform 7AffectedNo fix planned: Will not fix
Red Hat Single Sign-On 7AffectedNo fix planned: Will not fix
Red Hat build of Apache Camel 4.18.4 for Spring Boot 3.5.16Fixed RHSA-2026:71675
Not affected: 1 product
  • Red Hat Fuse 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59902
  2. 2026-10-03 Alias added: GHSA-2qj4-mmr9-4v2f
  3. 2026-10-16 Affected versions changed · Red Hat

References

Patch 3

Advisory 1

Other 3

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2026-30861 Netty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling Sanitization CVSS 3.1CRITICAL 9.8
  • TI-2026-30864 Netty: HttpClientCodec response desynchronization CVSS 3.1CRITICAL 9.1
  • TI-2026-30859 Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder) CVSS 3.1CRITICAL 9.1
  • TI-2026-40973 Netty: Missing CertificateID Validation in OCSP Response Allows Replay Attacks CVSS 3.1CRITICAL 9.1
  • TI-2026-40972 Uncontrolled resource consumption in netty CVSS 3.1HIGH 7.5
See all 92 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences