Allocation of Resources Without Limits or Throttling Affecting eap8-netty-transport-native-epoll package, versions <0:4.1.136-1.Final_redhat_00001.1.el8eap


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.1% (65th percentile)

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  • Snyk IDSNYK-RHEL8-EAP8NETTYTRANSPORTNATIVEEPOLL-20115471
  • published24 Sept 2026
  • disclosed4 Jul 2026

Introduced: 4 Jul 2026

CVE-2026-5680  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade RHEL:8 eap8-netty-transport-native-epoll to version 0:4.1.136-1.Final_redhat_00001.1.el8eap or higher.
This issue was patched in RHSA-2026:70228.

NVD Description

Note: Versions mentioned in the description apply only to the upstream eap8-netty-transport-native-epoll package and not the eap8-netty-transport-native-epoll package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw was found in Undertow. A remote attacker could exploit this vulnerability by sending specially crafted WebSocket messages with permessage-deflate negotiated. This could lead to excessive memory consumption due to the PerMessageDeflateFunction.largerBuffer() method using exponential doubling, resulting in a Denial of Service (DoS) for the affected application.

CVSS Base Scores

version 3.1