CVE-2026-44890
Netty has Unbounded Direct Memory Consumption in its RedisDecoder
- State
- Published
- Severity
- 7.5 High
- Published
- Jun 11, 2026
- Updated
- Sep 18, 2026
- Reserved
- May 7, 2026
Description
Netty is a network application framework for development of protocol servers and clients. In netty-codec-redis prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can cause DoS by sending crafted Redis payloads across multiple connections without `\r\n`. This exhausts the server's direct memory pool (OutOfDirectMemoryError), preventing legitimate connections from being processed. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
nettynetty |
|
References
- https://github.com/netty/netty/security/advisories/GHSA-6ghj-frrj-jjj3
- https://github.com/netty/netty/releases/tag/netty-4.1.135.Final
- https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
- https://access.redhat.com/security/cve/CVE-2026-44890vdb-entry
- RHBZ#2488053issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44890.json
- https://access.redhat.com/errata/RHSA-2026:53644vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:53645vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:53646vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:41951vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:50085vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:37390vendor-advisory
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