CVE-2025-55163

HIGH EPSS 57.8%
Published Aug 13, 202510mo ago · Modified Jun 17, 20262w ago
8.2 CVSS 4.0
High
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Published Aug 13, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago

Description

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.124.Final and 4.2.4.Final, Netty is vulnerable to MadeYouReset DDoS. This is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. This issue has been patched in versions 4.1.124.Final and 4.2.4.Final.

CVSS Details

Base Score
8.2
Exploitability
—
Impact
—
Vector string
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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
57.8% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-770

Affected Products 2

VendorProductVersionRange
nettynetty* <4.1.124
nettynetty*≥4.2.0  –  <4.2.4

References 3

  • openwall.com http://www.openwall.com/lists/oss-security/2025/08/16/1
  • github.com https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4
    ExploitVendor Advisory
  • kb.cert.org https://www.kb.cert.org/vuls/id/767506

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.