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Advisory record · GHSA-5xrh-qmmq-w6ch

Netty: SCTP reassembly nests buffers without bound

CVSS 7.5 HighEPSS 0.0061 · 49th percentile

Published by the GitHub Advisory Database at 8 Jun 2026, 23:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
io.netty:netty-transport-sctpMaven>=4.2.0.Final, <4.2.15.Final || <4.1.135.Final4.2.15.Final, 4.1.135.Final
Identifiers
GHSA-5xrh-qmmq-w6ch · CVE-2026-46340
Weakness (CWE)
CWE-770
Tags
Published
8 Jun 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Netty's io.netty:netty-transport-sctp package is vulnerable in versions 4.2.0.Final up to but not including 4.2.15.Final, and in versions before 4.1.135.Final. A remote peer that sends SCTP message fragments without ever setting the complete flag can make the reassembly buffer grow without limit, which can exhaust memory and cause denial of service. Upgrade to 4.2.15.Final or 4.1.135.Final. The source gives no workaround.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0061, the 49th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:17 UTC First seen by agentprime
  2. 31 Oct 2026, 14:17 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.