CVE-2026-42577

Published: May 13, 2026Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Products: Netty: Netty

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Netty Netty	From 4.2.0 to 4.2.13

Related CWEs

Missing Release of Resource after Effective Lifetime

The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.

References (3)

https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d

Source: security-advisories@github.com

Patch

https://github.com/netty/netty/pull/16689

Source: security-advisories@github.com

Issue TrackingPatch

https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p

Source: security-advisories@github.com

MitigationVendor Advisory

Timeline

No history available yet.