Description
Netty is an asynchronous, event-driven network application framework. From 4.2.0.Final to 4.2.13.Final , Netty's epoll transport fails to detect and close TCP connections that receive a RST after being half-closed, leading to stale channels that are never cleaned up and, in some code paths, a 100% CPU busy-loop in the event loop thread. This vulnerability is fixed in 4.2.13.Final.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| netty | netty | >= 4.2.0.Final, < 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 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | akhq | 0.27.1-r13 | — |
| Wolfi rolling | apache-activemq-artemis | 2.54.0-r0 | — |
| Wolfi rolling | apache-nifi | 2.9.0-r10 | — |
| Wolfi rolling | cassandra-5.0 | 5.0.8-r0 | — |
| Wolfi rolling | cassandra-reaper +1 | 4.2.1-r2 | — |
| Wolfi rolling | celeborn-0.6 | 0.6.3-r1 | — |
| Wolfi rolling | druid | 37.0.0-r8 | — |
| Wolfi rolling | flyway | 12.6.0-r0 | — |
| Wolfi rolling | infinispan-16.1 | 16.1.3-r2 | — |
| Wolfi rolling | keycloak-26.4-iamguarded-compat | 26.4.7-r9 | — |
| Wolfi rolling | keycloak-26.5 +1 | 26.5.7-r1 | — |
| Wolfi rolling | keycloak-26.6 +1 | 26.6.1-r2 | — |
| Wolfi rolling | kserve-modelmesh | 0.12.0-r31 | — |
| Wolfi rolling | management-api-for-apache-cassandra-5.0 | 0.1.116-r0 | — |
| Wolfi rolling | neo4j-2025.10 | No fix yet | — |
| Wolfi rolling | neo4j-2026.01 | 2026.01.4-r1 | — |
| Wolfi rolling | solr-10 | 10.0.0-r2 | — |
| Wolfi rolling | spark-4.0-scala-2.13 | 4.0.2-r11 | — |
| Wolfi rolling | spark-4.1-scala-2.13 | 4.1.2-r1 | — |
| Wolfi rolling | strimzi-kafka-operator-kafka-init +5 | 0.51.0-r26 | — |
| Wolfi rolling | strimzi-kafka-operator-kafka-thirdparty-libs-cc | 0.51.0-r24 | — |
| Wolfi rolling | tez | 0.10.5-r11 | — |
| Wolfi rolling | thingsboard-tb-node +1 | 4.3.1.1-r10 | — |
| Wolfi rolling | trino-plugin-hive +11 | 481-r0 | — |
| Wolfi rolling | wavefront-proxy | 13.9-r12 | — |
| Wolfi rolling | wildfly-openjdk-17 +1 | 39.0.1-r9 | — |
| Wolfi rolling | zipkin +1 | 3.6.1-r6 | — |
| Wolfi rolling | zookeeper-3.9 | 3.9.5-r1 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | io.netty:netty-transport-classes-epoll | >= 4.2.0.Final, < 4.2.13.Final | 4.2.13.Final | GHSA-rwm7-x88c-3g2p |
Advisories 2
- WID-SEC-2026-3046 IBM Concert: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- WID-SEC-2026-1372 Netty: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 15, 2026