# CVE-2026-45416: eap8-eap-product-conf-parent: Netty is a network application framework for development of protocol servers and clients

CVE-2026-45416 is fixed in 6 products on 1 platform, first by RHSA-2026:49700, released June 12, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-45416
- Priority: High
- CVSS: 7.5 (important)
- EPSS: 0.0092
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 12, 2026

## Description

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, SslClientHelloHandler.decode() reads the 24-bit TLS handshake length and, when the ClientHello does not fit in the first record, eagerly allocates `ctx.alloc().buffer(handshakeLength)` (line 161). The guard at line 140 is `handshakeLength > maxClientHelloLength && maxClientHelloLength != 0`, and the commonly-used SniHandler/AbstractSniHandler constructors (SniHandler(Mapping), SniHandler(AsyncMapping), AbstractSniHandler()) pass maxClientHelloLength=0 and handshakeTimeoutMillis=0, so the length guard is disabled and no timeout is scheduled. A 16 MiB request exceeds the default pooled chunk size and becomes a huge/unpooled allocation performed immediately. The buffer is retained in the handler until the channel closes. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | eap8-eap-product-conf-parent RHEL 10 | 801.7.1-1.GA_redhat_00001.1.el10eap | [RHSA-2026:49700](https://patchblox.com/security/data/fix/linux/rhsa-2026-49700.md) | Jun 12, 2026 |
| Linux | eap8-netty RHEL 10 | 4.1.135-1.Final_redhat_00001.1.el10eap | [RHSA-2026:49700](https://patchblox.com/security/data/fix/linux/rhsa-2026-49700.md) | Jun 12, 2026 |
| Linux | eap8-netty-transport-native-epoll RHEL 10 | 4.1.135-1.Final_redhat_00001.1.el10eap | [RHSA-2026:49700](https://patchblox.com/security/data/fix/linux/rhsa-2026-49700.md) | Jun 12, 2026 |
| Linux | eap8-wildfly RHEL 10 | 8.1.7.1-1.GA_redhat_00004.1.el10eap | [RHSA-2026:49700](https://patchblox.com/security/data/fix/linux/rhsa-2026-49700.md) | Jun 12, 2026 |
| Linux | netty sles 15.7 | 4.1.135-150200.4.50.1 | [SUSE-SU-2026:2802-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2802-1.md) | Jul 8, 2026 |
| Linux | netty-tcnative sles 15.6 | 2.0.79-150200.3.45.1 | [SUSE-SU-2026:2802-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2802-1.md) | Jul 8, 2026 |
| Linux | netty-tcnative sles 15.7 | 2.0.79-150200.3.45.1 | [SUSE-SU-2026:2802-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2802-1.md) | Jul 8, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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