CVE-2026-42577
Netty: epoll transport denial of service via RST on half-closed TCP connection
- State
- Published
- Severity
- 7.5 High
- Published
- May 13, 2026
- Updated
- May 14, 2026
- Reserved
- Apr 28, 2026
Description
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.
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 |
Weaknesses
- CWE-772 Missing Release of Resource after Effective Lifetime
Affected Products
| Product | Versions |
|---|---|
nettynetty |
|
References
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