CVE-2026-42577

HIGH EPSS 32.6%
Published May 13, 20261mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published May 13, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
32.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-772

Affected Products 1

VendorProductVersionRange
nettynetty*≥4.2.0  –  <4.2.13

References 3

  • github.com https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d
    Patch
  • github.com https://github.com/netty/netty/pull/16689
    Issue TrackingPatch
  • github.com https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p
    MitigationVendor Advisory

Remediation

  • github.com https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d
    Patch
  • github.com https://github.com/netty/netty/pull/16689
    Issue TrackingPatch