CVE-2026-47244

תיאור (מקור, אנגלית)

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, DefaultHttp2Connection.DefaultEndpoint initialises maxActiveStreams/maxStreams to Integer.MAX_VALUE, and Http2Settings never inserts SETTINGS_MAX_CONCURRENT_STREAMS by default (Http2Settings.java:305-307 only clamps a user-supplied value). Unless the application explicitly calls initialSettings().maxConcurrentStreams(n), a Netty HTTP/2 server advertises no limit and enforces none locally. Each open stream allocates a DefaultStream object, PropertyMap slots, flow-controller state and IntObjectHashMap entry; with ~2^30 permissible odd stream IDs a single TCP connection can create hundreds of thousands of long-lived stream objects. This is also the precondition for CVE-2023-44487-style Rapid-Reset amplification, where the absence of a low concurrent cap multiplies backend work. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

מדדים

CVSS 3.1

5.3 (MEDIUM) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-11/8/2026

CWE

CWE-400

מוצרים מושפעים

netty: netty

קישורים

• https://github.com/netty/netty/security/advisories/GHSA-5x3r-wrvg-rp6q Vendor Advisory
• https://github.com/netty/netty/releases/tag/netty-4.1.135.Final Release Notes
• https://github.com/netty/netty/releases/tag/netty-4.2.15.Final Release Notes