CVE-2026-42577 — Netty: epoll transport denial of service via RST on half-closed TCP connection
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 r…
Published: 2026-05-13 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7