CVE-2025-55163 — Netty MadeYouReset HTTP/2 DDoS Vulnerability

Affected: netty

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.

USN-8654-1 — netty vulnerabilities

Affected: Ubuntu:Pro:16.04:LTS: netty, Ubuntu:Pro:18.04:LTS: netty, Ubuntu:Pro:20.04:LTS: netty, Ubuntu:22.04:LTS: netty, Ubuntu:24.04:LTS: netty

It was discovered that Netty did not properly handle malformed HTTP/2 control frames. An attacker could use this to cause a denial of service via resource exhaustion. This issue only affects Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2025-55163)

It was discovered that Netty did not properly validate the request URI for line-break characters. An attacker could use this to perform CRLF injection and request smuggling. (CVE-2025-67735)

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CVE-2025-55163 — Netty MadeYouReset HTTP/2 DDoS Vulnerability

USN-8654-1 — netty vulnerabilities