Allocation of Resources Without Limits or Throttling Affecting netty-tcnative package, versions <2.0.80-150200.3.48.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.61% (47th percentile)

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  • Snyk IDSNYK-SLES156-NETTYTCNATIVE-18533084
  • published5 Aug 2026
  • disclosed4 Aug 2026

Introduced: 4 Aug 2026

CVE-2026-59899  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 netty-tcnative to version 2.0.80-150200.3.48.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream netty-tcnative package and not the netty-tcnative package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder (the superclass of the production handler HttpContentCompressor) maintains a per-channel ArrayDeque&lt;CharSequence&gt; named acceptEncodingQueue that accumulates attacker-controlled data without any size limit. The queue is filled on the I/O thread for every inbound HTTP request and drained only when the application later writes a non-1xx response. This creates a resource exhaustion vulnerability when an attacker exploits HTTP/1.1 pipelining to flood the connection with requests faster than the application produces responses. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.

CVSS Base Scores

version 3.1