Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, the Netty Redis codec encoder (RedisEncoder) writes user-controlled string content directly to the network output buffer without validating or sanitizing CRLF (\r\n) characters. Since the Redis Serialization Protocol (RESP) uses CRLF as the command/response delimiter, an attacker who can control the content of a Redis message can inject arbitrary Redis commands or forge fake responses. 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-redis | >= 4.2.0.Alpha1, < 4.2.13.Final, < 4.1.133.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 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | netty | 1:4.1.48-16ubuntu0.1~esm2 | — |
| Ubuntu Pro 24.04 LTS | netty | 1:4.1.48-9ubuntu0.1+esm3 | — |
| Ubuntu Pro 22.04 LTS | netty | 1:4.1.48-4+deb11u2ubuntu0.1+esm3 | — |
| Ubuntu Pro 20.04 LTS | netty | 1:4.1.45-1ubuntu0.1~esm6 | — |
| Ubuntu Pro 18.04 LTS | netty | 1:4.1.7-4ubuntu0.1+esm6 | — |
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 | celeborn-0.6 | 0.6.3-r3 | — |
| Wolfi rolling | druid | 37.0.0-r8 | — |
| Wolfi rolling | management-api-for-apache-cassandra-5.0 | 0.1.117-r1 | — |
| Wolfi rolling | tez | 0.10.5-r12 | — |
| Wolfi rolling | thingsboard-tb-node +1 | 4.3.1.1-r9 | — |
| Wolfi rolling | trino-plugin-hive +7 | 481-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | io.netty:netty-codec-redis | >= 4.2.0.Alpha1, < 4.2.13.Final | 4.2.13.Final | GHSA-rgrr-p7gp-5xj7 |
| Maven | io.netty:netty-codec-redis | < 4.1.133.Final | 4.1.133.Final | GHSA-rgrr-p7gp-5xj7 |
Advisories 3
- WID-SEC-2026-1372 Netty: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 15, 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