CVE-2026-42577
CVE-2026-42577 · Netty: epoll transport denial of service via RST on half-closed TCP connection
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.5 · High · EPSS 0.4%
- Published
- Updated
Stack: system
Affected products and versions
netty
- Versions
- >= 4.2.0.Final, < 4.2.13.Final: Affected
No fix published
netty Debian:12
- Versions
- 1:4.1.48-10
- 1:4.1.48-11
- 1:4.1.48-12
- 1:4.1.48-13
- 1:4.1.48-14
- 1:4.1.48-15
- 1:4.1.48-16
- 1:4.1.48-7
- 1:4.1.48-7+deb12u1
- 1:4.1.48-7+deb12u2
- 1:4.1.48-8
- 1:4.1.48-9
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
netty Debian:13
- Versions
- 1:4.1.48-10
- 1:4.1.48-10+deb13u1
- 1:4.1.48-11
- 1:4.1.48-12
- 1:4.1.48-13
- 1:4.1.48-14
- 1:4.1.48-15
- 1:4.1.48-16
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
netty Debian:14
- Versions
- 1:4.1.48-10
- 1:4.1.48-11
- 1:4.1.48-12
- 1:4.1.48-13
- 1:4.1.48-14
- 1:4.1.48-15
- 1:4.1.48-16
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published