Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Netty | Netty | < 4.1.124 |
Related Weaknesses (CWE)
References
- https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4ExploitVendor Advisory
- http://www.openwall.com/lists/oss-security/2025/08/16/1
- https://www.kb.cert.org/vuls/id/767506
FAQ
What is CVE-2025-55163?
CVE-2025-55163 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2025-55163?
CVE-2025-55163 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-55163?
Check the references section above for vendor advisories and patch information. Affected products include: Netty Netty.