Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Lz4FrameDecoder allocates a ByteBuf of size decompressedLength (up to 32 MB per block) before LZ4 runs. A peer only needs a 21-byte header plus compressedLength payload bytes - 22 bytes if compressedLength == 1 - to force that allocation. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| netty | netty | >= 4.2.0.Alpha1, < 4.2.13.Final, < 4.1.133.Final | — |
| io.netty | netty-codec | < 4.1.133.Final | — |
| io.netty | netty-codec-compression | < 4.2.13.Final | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | netty | No fix yet | — |
| Debian 13 | netty | No fix yet | — |
| Debian 12 | netty | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Jboss Enterprise Application Platform Eus 7 | eap7-hibernate +5 | 5.1.17-5.Final_redhat_00006.1.ep7.el7 | RHSA-2026:73976, RHSA-2026:73644 |
| Red Hat Jboss Enterprise Application Platform Eus 7 | eap7-jboss-server-migration +21 | 1.7.2-24.Final_redhat_00026.1.el7eap | RHSA-2026:73644 |
| Red Hat Jboss Enterprise Application Platform Eus 7 | eap7-netty +1 | 4.1.63-4.Final_redhat_00005.1.ep7.el7 | RHSA-2026:73976, RHSA-2026:73644 |
| Red Hat Jboss Enterprise Application Platform Eus 7 | eap7-wildfly +1 | 7.1.16-1.GA_redhat_00002.1.ep7.el7 | RHSA-2026:73976, RHSA-2026:73644 |
| Red Hat Jboss Enterprise Application Platform Eus 7 | eap7-wildfly-javadocs +2 | 7.3.19-1.GA_redhat_00004.1.el7eap | RHSA-2026:73644 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | netty | 4.1.133-150200.4.46.1 | SUSE-SU-2026:2308-1 |
| SLES 15 SP7 | netty-tcnative | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 |
| SLES 15 SP6 | netty-tcnative | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 |
| SLES 15 SP5 | netty-tcnative | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 |
| SLES 15 SP4 | netty-tcnative | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | netty-tcnative | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 |
| SLES for SAP 15 SP5 | netty-tcnative | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 |
| SLES for SAP 15 SP4 | netty-tcnative | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 |
| SLE HPC 15 SP5 | netty-tcnative | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 |
| SLE HPC 15 SP4 | netty-tcnative | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | netty | 4.1.133-1.1 | openSUSE-SU-2026:10795-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | akhq | 0.27.1-r1 | — |
| Wolfi rolling | apache-activemq-artemis | 2.54.0-r1 | — |
| Wolfi rolling | apache-nifi | 2.9.0-r6 | — |
| Wolfi rolling | apache-nifi-registry | 2.9.0-r8 | — |
| Wolfi rolling | apache-pulsar-4.2 | 4.2.1-r2 | — |
| Wolfi rolling | apicurio-registry | 3.2.1-r7 | — |
| Wolfi rolling | cassandra-5.0 | 5.0.8-r1 | — |
| Wolfi rolling | celeborn-0.6 | 0.6.3-r3 | — |
| Wolfi rolling | docker-selenium-base | 4.43.0.20260404-r2 | — |
| Wolfi rolling | druid | 37.0.0-r5 | — |
| Wolfi rolling | flyway | 12.6.0-r0 | — |
| Wolfi rolling | infinispan-16.1 | 16.1.3-r2 | — |
| Wolfi rolling | keycloak-26.5 +5 | No fix yet | — |
| Wolfi rolling | keycloak-26.6 +2 | 26.6.1-r2 | — |
| Wolfi rolling | kserve-modelmesh | 0.12.0-r33 | — |
| Wolfi rolling | logstash-9.3 +1 | 9.3.4-r4 | — |
| Wolfi rolling | management-api-for-apache-cassandra-5.0 | 0.1.117-r1 | — |
| Wolfi rolling | neo4j-2026.01 | 2026.01.4-r1 | — |
| Wolfi rolling | opensearch-2 | 2.19.4-r14 | — |
| Wolfi rolling | opensearch-3 +5 | 3.6.0-r5 | — |
| Wolfi rolling | opensearch-3-discovery-ec2 +2 | 3.8.0-r3 | — |
| Wolfi rolling | opensearch-3-security-analytics | 3.7.0-r0 | — |
| Wolfi rolling | selenium-server | 4.44.0-r0 | — |
| Wolfi rolling | sonarqube | 26.7.0.124771-r0 | — |
| Wolfi rolling | spark-4.0-scala-2.13 | 4.0.2-r12 | — |
| Wolfi rolling | spark-4.1-scala-2.13 | 4.1.2-r0 | — |
| Wolfi rolling | strimzi-kafka-operator-kafka-init +5 | 0.51.0-r26 | — |
| Wolfi rolling | strimzi-kafka-operator-kafka-thirdparty-libs-cc | 1.0.0-r2 | — |
| Wolfi rolling | tez | 0.10.5-r12 | — |
| Wolfi rolling | thingsboard-tb-node +1 | 4.3.1.1-r9 | — |
| Wolfi rolling | trino-plugin-hive +12 | 481-r0 | — |
| Wolfi rolling | wavefront-proxy | 13.9-r13 | — |
| Wolfi rolling | wildfly-openjdk-17 +1 | 39.0.1-r10 | — |
| Wolfi rolling | zipkin +1 | 3.6.1-r6 | — |
| Wolfi rolling | zookeeper-3.9 | 3.9.5-r3 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | io.netty:netty-codec | < 4.1.133.Final | 4.1.133.Final | GHSA-mj4r-2hfc-f8p6 |
| Maven | io.netty:netty-codec-compression | < 4.2.13.Final | 4.2.13.Final | GHSA-mj4r-2hfc-f8p6 |
Advisories 10
- WID-SEC-2026-3376 Atlassian Bamboo, Bitbucket, Confluence, Fisheye/Crucible, Jira Software und Jira Service Management: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- WID-SEC-2026-2923 Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye, und Jira): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- RHSA-2026:73976 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.1.16 security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:73644 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.3.19 Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- WID-SEC-2026-1372 Netty: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 15, 2026
- WID-SEC-2026-2460 Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 1, 2026
- WID-SEC-2026-1955 Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 23, 2026
- NCSC-2026-0325 Kwetsbaarheden verholpen in Atlassian producten NCSC-NL (Netherlands) · Aug 24, 2026
- SUSE-SU-2026:2308-1 Security update for netty, netty-tcnative SUSE / openSUSE Security Updates · Jun 10, 2026
- openSUSE-SU-2026:10795-1 netty-4.1.133-1.1 on GA media SUSE / openSUSE Security Updates · May 17, 2026