Netty has Unbounded Direct Memory Consumption in its RedisDecoder
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.5%
exploitation probability
0.5%top 62% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
netty · nettyReferences
https://access.redhat.com/errata/RHSA-2026:37390https://access.redhat.com/errata/RHSA-2026:41951https://access.redhat.com/errata/RHSA-2026:50085https://access.redhat.com/errata/RHSA-2026:53644https://access.redhat.com/errata/RHSA-2026:53806https://access.redhat.com/security/cve/CVE-2026-44890https://bugzilla.redhat.com/show_bug.cgi?id=2488053https://github.com/netty/netty/releases/tag/netty-4.1.135.Finalhttps://github.com/netty/netty/releases/tag/netty-4.2.15.Finalhttps://github.com/netty/netty/security/advisories/GHSA-6ghj-frrj-jjj3https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44890.json