CVE-2026-42577

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d	Patch
https://github.com/netty/netty/pull/16689	Issue Tracking Patch
https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-13 19:17

Updated : 2026-06-17 10:48

NVD link : CVE-2026-42577

Mitre link : CVE-2026-42577

CVE.ORG link : CVE-2026-42577

JSON object : View

Products Affected

netty

netty

CWE

CWE-772

Missing Release of Resource after Effective Lifetime

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