CVE-2025-8671
CVE-2025-8671
- State
- Published
- Severity
- 7.5 High
- Published
- Aug 13, 2025
- Updated
- Nov 4, 2025
- Reserved
- Aug 6, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-404 Improper Resource Shutdown or Release
Affected Products
| Product | Versions |
|---|---|
Enterprise Module for Development ToolsSUSE Linux |
|
Enterprise High Performance Computing (HPC)SUSE Linux |
|
Varnish EnterpriseVarnish Software |
|
Varnish CacheVarnish Software |
|
Varnish CacheVarnish Software |
|
H20Fastly |
|
LinuxWind River |
|
Enterprise DesktopSUSE Linux |
|
Enterprise High Performance ComputingSUSE Linux |
|
Enterprise Module for Dev ToolsSUSE Linux |
|
Enterprise Module for Package HubSUSE Linux |
|
Enterprise ServerSUSE Linux |
|
Enterprise Server for SAP ApplicationsSUSE Linux |
|
SUSE Manager ServerSUSE Linux |
|
SUSE Manager Server LTSSUSE Linux |
|
SUSE Manager ProxySUSE Linux |
|
SUSE Manager Retail Branch ServerSUSE Linux |
|
openSUSE LeapSUSE Linux |
|
References
- https://galbarnahum.com/made-you-reset
- https://kb.cert.org/vuls/id/767506
- https://varnish-cache.org/security/VSV00017.html
- https://www.fastlystatus.com/incident/377810
- https://github.com/h2o/h2o/commit/4729b661e3c6654198d2cc62997e1af58bef4b80
- https://support2.windriver.com/index.php?page=security-notices
- https://www.suse.com/support/kb/doc/?id=000021980
- https://gitlab.isc.org/isc-projects/bind9/-/issues/5325
- https://github.com/h2o/h2o/security/advisories/GHSA-mrjm-qq9m-9mjq
- https://github.com/envoyproxy/envoy/issues/40739
- https://github.com/varnish/hitch/issues/397
- https://github.com/Kong/kong/discussions/14731
- https://deepness-lab.org/publications/madeyoureset/
- https://www.imperva.com/blog/madeyoureset-turning-http-2-server-against-itself/
- https://www.kb.cert.org/vuls/id/767506
- http://www.openwall.com/lists/oss-security/2025/09/18/1
- http://www.openwall.com/lists/oss-security/2025/08/13/6
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