SB2026052039 - IBM Rational Performance Tester update for Netty

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Main Vulnerability Database SB2026052039

SB2026052039 - IBM Rational Performance Tester update for Netty

Published: May 20, 2026

Security Bulletin ID SB2026052039
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-42583)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in io.netty.handler.codec.compression.Lz4FrameDecoder#decode when processing crafted LZ4 frames. A remote attacker can send a specially crafted compressed frame header and payload to cause a denial of service.

On the compressed path, header fields are trusted for sizing, allowing a small request to force allocation of a much larger ByteBuf.


Remediation

Install update from vendor's website.

References