SUSE-SU-2025:03021-1: important: Security update for netty

[SLE-UPDATES]

# Security update for netty

Announcement ID: SUSE-SU-2025:03021-1  
Release Date: 2025-08-29T09:42:17Z  
Rating: important  
References:

  * bsc#1247991

  
Cross-References:

  * CVE-2025-55163

  
CVSS scores:

  * CVE-2025-55163 ( SUSE ):  8.7
    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
  * CVE-2025-55163 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-55163 ( NVD ):  8.2
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

  
Affected Products:

  * SUSE Manager Server 4.3
  * SUSE Manager Server 4.3 LTS

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for netty fixes the following issues:

  * CVE-2025-55163: Fixed "MadeYouReset" DoS attack in HTTP/2 protocol
    (including DNS over HTTPS) (bsc#1247991)

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Manager Server 4.3 LTS  
    zypper in -t patch SUSE-SLE-Product-SUSE-Manager-Server-4.3-LTS-2025-3021=1

## Package List:

  * SUSE Manager Server 4.3 LTS (noarch)
    * netty-4.1.44.Final-150400.3.9.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-55163.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1247991

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