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CVE-2025-8671

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CVE-2025-8671

Published: Aug 13, 2025

Modified: Nov 4, 2025

PUBLISHED

Description

A mismatch caused by client-triggered server-sent stream resets between HTTP/2 specifications and the internal architectures of some HTTP/2 implementations may result in excessive server resource consumption leading to denial-of-service (DoS). By opening streams and then rapidly triggering the server to reset them—using malformed frames or flow control errors—an attacker can exploit incorrect stream accounting. Streams reset by the server are considered closed at the protocol level, even though backend processing continues. This allows a client to cause the server to handle an unbounded number of concurrent streams on a single connection. This CVE will be updated as affected product details are released.

VendorProductVersions

SUSE Linux

Enterprise Module for Development Tools

affected
15 SP2 - < 15-SP5

SUSE Linux

Enterprise High Performance Computing (HPC)

affected
15 - < 15 SP5

Varnish Software

Varnish Enterprise

affected
6.0.x - <= 6.0.14r4

Varnish Software

Varnish Cache

affected
6.0LTS - <= 6.014

Varnish Software

Varnish Cache

affected
5.x - <= 7.71

Fastly

H20

affected
579ecfa

Wind River

Linux

affected
LTS22 - <= TLS25

SUSE Linux

Enterprise Desktop

affected
15 SP6 - < 15 SP7

SUSE Linux

Enterprise High Performance Computing

affected
15 SP3 - < 15 SP7

SUSE Linux

Enterprise Module for Dev Tools

affected
15 SP3 - < 15 SP7

SUSE Linux

Enterprise Module for Package Hub

affected
15 SP5 - < 15 SP7

SUSE Linux

Enterprise Server

affected
12 SP5 - < 15 SP7

SUSE Linux

Enterprise Server for SAP Applications

affected
15 SP6 - < 15 SP7

SUSE Linux

SUSE Manager Server

affected
4.3

SUSE Linux

SUSE Manager Server LTS

affected
4.3

SUSE Linux

SUSE Manager Proxy

affected
4.3

SUSE Linux

SUSE Manager Retail Branch Server

affected
4.3

SUSE Linux

openSUSE Leap

affected
15.6

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