Description
Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| netty | netty | >= 4.2.0.Final, < 4.2.15.Final, < 4.1.135.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 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | netty | No fix yet | — |
| Ubuntu 25.10 | netty | No fix yet | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 24.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 22.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 20.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 18.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 16.04 LTS | netty | No fix yet | — |
| Ubuntu Pro 14.04 LTS | netty | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Single Sign On 7 | rh-sso7-keycloak +1 | 18.0.20-1.redhat_00001.1.el7sso | RHSA-2026:76130, RHSA-2026:76129, RHSA-2026:76128 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-activemq-artemis +15 | 2.16.0-22.redhat_00057.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-glassfish-jsf | 2.3.14-11.SP11_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-ironjacamar +8 | 1.5.26-2.Final_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-jackson-core +10 | 2.18.8-1.redhat_00003.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-jboss-remoting | 5.0.31-3.SP2_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-jboss-server-migration +2 | 1.10.0-46.Final_redhat_00044.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-netty +26 | 4.1.135-1.Final_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-picketlink-api +7 | 2.5.5-24.SP12_redhat_00016.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-picketlink-bindings +1 | 2.5.5-30.SP12_redhat_00020.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-undertow | 2.2.40-1.SP3_redhat_00001.1.el8eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-wildfly +4 | 7.4.25-2.GA_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-wildfly-java-jdk17 | 7.4.25-2.GA_redhat_00001.1.el8eap | RHSA-2026:53646, RHSA-2026:53645 |
| Red Hat JBoss EAP 8 | eap8-eap-product-conf-parent +1 | 801.7.1-1.GA_redhat_00001.1.el8eap | RHSA-2026:49700 |
| Red Hat JBoss EAP 8 | eap8-jose4j | 0.9.6-2.redhat_00002.1.el8eap | RHSA-2026:49700 |
| Red Hat JBoss EAP 8 | eap8-netty +14 | 4.1.135-1.Final_redhat_00001.1.el8eap | RHSA-2026:49700 |
| Red Hat JBoss EAP 8 | eap8-wildfly +3 | 8.1.7.1-1.GA_redhat_00004.1.el8eap | RHSA-2026:49700 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | netty | 4.1.135-150200.4.50.1 | SUSE-SU-2026:2802-1 |
| SLES 15 SP7 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES 15 SP6 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES 15 SP5 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES 15 SP4 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES for SAP 15 SP5 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLES for SAP 15 SP4 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLE HPC 15 SP5 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
| SLE HPC 15 SP4 | netty-tcnative | 2.0.79-150200.3.45.1 | SUSE-SU-2026:2802-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | netty | 4.1.135-1.1 | openSUSE-SU-2026:11033-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | akhq | 0.27.1-r3 | — |
| Wolfi rolling | apache-activemq-artemis | 2.54.0-r5 | — |
| Wolfi rolling | apache-nifi | 2.9.0-r13 | — |
| Wolfi rolling | apache-nifi-registry | 2.9.0-r10 | — |
| Wolfi rolling | apache-pulsar-4.2 | 4.2.2-r3 | — |
| Wolfi rolling | apicurio-registry | 3.3.0-r2 | — |
| Wolfi rolling | cassandra-5.0 | 5.0.8-r6 | — |
| Wolfi rolling | cassandra-reaper | 4.2.4-r2 | — |
| Wolfi rolling | celeborn-0.6 | 0.6.3-r7 | — |
| Wolfi rolling | docker-selenium-base | 4.44.0.20260505-r2 | — |
| Wolfi rolling | docker-selenium-hub +2 | 4.48.0.20260909-r0 | — |
| Wolfi rolling | druid | 37.0.0-r12 | — |
| Wolfi rolling | flyway | 12.8.1-r3 | — |
| Wolfi rolling | infinispan-16.1 | 16.1.4-r3 | — |
| Wolfi rolling | keycloak-26.5 +2 | 26.5.7-r7 | — |
| Wolfi rolling | keycloak-26.6 +2 | 26.6.3-r2 | — |
| Wolfi rolling | kserve-modelmesh | 0.12.0-r35 | — |
| Wolfi rolling | logstash-9.3 +4 | No fix yet | — |
| Wolfi rolling | logstash-9.4 +1 | 9.4.2-r5 | — |
| Wolfi rolling | management-api-for-apache-cassandra-5.0 | 0.1.119-r0 | — |
| Wolfi rolling | neo4j-2026.05 | 2026.05.0-r1 | — |
| Wolfi rolling | opensearch-2 | 2.19.5-r1 | — |
| Wolfi rolling | opensearch-3 +6 | 3.6.0-r7 | — |
| Wolfi rolling | opensearch-3-discovery-ec2 +2 | 3.8.0-r3 | — |
| Wolfi rolling | opensearch-3-security-analytics | 3.8.0-r2 | — |
| Wolfi rolling | selenium-server | 4.44.0-r2 | — |
| Wolfi rolling | solr-10 +1 | 10.0.0-r5 | — |
| Wolfi rolling | sonarqube | 26.8.0.126808-r0 | — |
| Wolfi rolling | spark-4.0-scala-2.13 | 4.0.3-r0 | — |
| Wolfi rolling | spark-4.1-scala-2.13 | 4.1.2-r4 | — |
| Wolfi rolling | strimzi-kafka-operator-kafka-init +6 | 1.0.0-r6 | — |
| Wolfi rolling | tez | 0.10.5-r16 | — |
| Wolfi rolling | thingsboard-tb-node +1 | 4.3.1.2-r4 | — |
| Wolfi rolling | trino +3 | 483-r7 | — |
| Wolfi rolling | trino-plugin-hive +16 | 481-r7 | — |
| Wolfi rolling | wavefront-proxy | 13.9-r18 | — |
| Wolfi rolling | wildfly-openjdk-17 +1 | 40.0.0-r1 | — |
| Wolfi rolling | zipkin +1 | 3.6.1-r10 | — |
| Wolfi rolling | zookeeper-3.9 | 3.9.5-r7 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | io.netty:netty-handler | >= 4.2.0.Final, < 4.2.15.Final | 4.2.15.Final | GHSA-3qp7-7mw8-wx86 |
| Maven | io.netty:netty-handler | < 4.1.135.Final | 4.1.135.Final | GHSA-3qp7-7mw8-wx86 |
Advisories 14
- WID-SEC-2026-1814 Netty: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- 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-2026:76130 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 9 Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:76129 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 8 Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:76128 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.13 security update on RHEL 7 Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:53646 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 Security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:53645 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 Security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:53644 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 security pdate Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:49700 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.7 security update Red Hat Security Advisories (RHSA) · Oct 20, 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
- NCSC-2026-0325 Kwetsbaarheden verholpen in Atlassian producten NCSC-NL (Netherlands) · Aug 24, 2026
- SUSE-SU-2026:2802-1 Security update for netty, netty-tcnative SUSE / openSUSE Security Updates · Jul 9, 2026
- openSUSE-SU-2026:11033-1 netty-4.1.135-1.1 on GA media SUSE / openSUSE Security Updates · Jun 16, 2026